Clearing Wi-Fi Cache: A Complete Guide for Your Router, Phone, PC, and Smart TV

Have you ever experienced a situation where your Wi-Fi suddenly starts to slow down, your devices refuse to connect, and rebooting your router only helps for a few hours? The cause could be... cached Wi-Fi data — temporary files saved by routers and client devices to speed up performance. Over time, this cache accumulates, conflicts with new settings, or becomes corrupted, leading to crashes.

Clearing your Wi-Fi cache is a simple yet effective procedure that often resolves connection issues without any complicated steps. In this article, we'll cover How to clear the cache on a router (including popular models TP-Link, ASUS, Keenetic), as well as on smartphones (Android/iOS), laptops (Windows/macOS) And Smart TVYou will learn in which cases this is truly necessary, and when the problem lies elsewhere.

What is Wi-Fi cache and why should you clear it?

Wi-Fi cache is temporary data that is stored:

• 📶 Routers: lists of connected devices, DHCP leases, error logs, data on previous sessions.
• 📱 Client devices (phones, laptops, TV): saved networks, passwords, IP addresses, connection speed data.
• 🌐 Operating systems: network adapter configuration files, DNS cache, ARP tables.

Over time, this data may:

• 🔄 Conflict with new settings (for example, after changing the password or router firmware).
• 🐢 Slow down the connection, because the device is trying to use outdated routes.
• 🚫 Block access to the network due to corrupted files (for example, after a sudden power outage).

Clearing the cache helps in 70% of cases when:

• 🔌 The device "sees" the network, but does not connect (error "Authentication" or "Obtaining IP address").
• 📉 Internet speed drops sharply for no apparent reason.
• 🔄 The router "forgets" the settings after a reboot.

⚠️ Attention: If the problem occurs only on one device, clear the cache on that device. If the issue affects the entire network, start with the router.

How to clear the Wi-Fi cache on a router

The clearing method depends on the router model. Most modern devices allow you to clear the cache through the web interface, but some (especially budget ones) require hardware reset.

Method 1: Soft reset via admin panel

Suitable for routers TP-Link, ASUS, Keenetic, MikroTik, Zyxel and others with a web interface.

1. Connect to the router via cable or Wi-Fi (if the network is still available).
2. Open your browser and enter your router's IP address in the address bar. This is usually:
   • 192.168.0.1 (For TP-Link, D-Link)
   • 192.168.1.1 (For ASUS, Keenetic)
   • 192.168.8.1 (For Huawei)

Enter your login and password (by default it is often admin/admin or indicated on the router sticker).

Go to the section System tools (or Administration, Maintenance).

Find the option Reboot (Reboot) or Factory Default (Factory reset).

For partial cache clearing select Reboot. For full reset (including all settings) - Factory Default.

On Keenetic routers, clearing the DHCP cache and ARP tables is available in the "Diagnostics" → "Cache Clear" section.

Method 2: Hard reset (using the Reset button)

Use this method if:

• 🔒 Forgot your admin panel password.
• 🖥️ The router's web interface does not open.
• 🔄 You need to completely reset all settings (including cache).

Instructions:

1. Find the button on the back of the router. Reset (usually recessed into the body).
2. Take a paper clip or a toothpick and press and hold the button 10-15 seconds.
3. Release the button when the indicators on the router start flashing randomly (sign of a reset).
4. Wait for the reboot (1–2 minutes). The router will return to factory settings.

⚠️ Attention: After a hard reset, you'll need to reconfigure your router (network name, password, encryption type, PPPoE, etc.). Prepare your ISP information in advance.

Clearing Wi-Fi Cache on Android Smartphones

On Android The Wi-Fi cache is stored in two places: network settings And system filesLet's consider both options.

Method 1: Deleting a saved network

This is the simplest method that helps if the phone “does not see” the network or returns an authentication error.

1. Open Settings → Wi-Fi.
2. Find your network in the list and tap on it.
3. Select Delete (or Forget the network).
4. Please reconnect by entering your password.

This method cleans:

• 🔑 Saved password.
• 📡 Data on previous connections (IP, DNS, speed).

Method 2: Reset network settings (complete wipe)

If deleting the network doesn't help, try resetting all network settings. This will remove:

• 📶 All saved Wi-Fi networks.
• 📱 Mobile Internet settings (APN).
• 🔄 Bluetooth and VPN data.

Instructions:

1. Go to Settings → System → Reset settings.
2. Select Reset network settings (or Reset Wi-Fi, mobile network, and Bluetooth).
3. Confirm the action.
4. After rebooting, reconnect to Wi-Fi.

⚠️ Attention: On some phones (eg. Xiaomi, SamsungAfter the reset, you may need to reconfigure your mobile internet. Save your APN settings in advance (they can be found in your operator account).

What should I do if Wi-Fi doesn't work after a reset?

If after clearing the cache the network still does not connect, check:

- The entered password is correct (case sensitive!).

- Encryption type (for example, if the router uses WPA3, but the phone does not support it).

- MAC filtering settings on the router (your device may be blacklisted).

Method 3: Clearing the cache via recovery mode (for advanced users)

If the phone “forgets” networks immediately after connecting or displays an error IP conflict, clearing the cache might help WifiService through Recovery Mode.

1. Turn off your phone.
2. Press the key combination to enter Recovery (For example, Power + Volume Up For Samsung).
3. In the recovery menu, select Wipe cache partition.
4. After cleaning, reboot your device.

This method does not delete user data, but it does clear system caches, including network caches.

Clearing the Wi-Fi Cache on iPhone and iPad

On iOS There is no separate option to clear the Wi-Fi cache, but there are two working methods: deleting the network and resetting network settings.

Method 1: Forget the network

1. Open Settings → Wi-Fi.
2. Tap on the symbol i next to the name of your network.
3. Select Forget this network.
4. Please reconnect by entering your password.

This removes:

• 🔑 Network password.
• 📡 Data on previous connections (IP, DNS).

Method 2: Reset network settings

If your Wi-Fi keeps disconnecting or your speed is dropping, try a hard reset:

1. Go to Settings → General → Transfer or reset iPhone.
2. Select Reset → Reset network settings.
3. Enter your device password to confirm.

After reset:

• 📱 All saved Wi-Fi networks will be deleted.
• 📡 VPN and APN settings will be reset to default.
• 🔄 You may need to reactivate your SIM card (rare).

⚠️ Attention: On iPhone with iOS 17 and newer may not work temporarily after a network reset iCloud Private Relay or Limit IP Address Tracking. Disable these features in Settings → Wi-Fi → [your network], if problems arise.

Clearing the Wi-Fi Cache on Windows 10/11

On PC with Windows Wi-Fi cache includes:

• 📡 Saved networks and passwords.
• 🌐 DNS cache.
• 🔧 Network adapter settings.

Method 1: Removing the network via Settings

1. Click Win + I and select Network and Internet → Wi-Fi.
2. Click Managing known networks.
3. Select your network and click Forget.

Method 2: Clearing the DNS Cache

If websites don't open or load slowly, flush your DNS:

ipconfig /flushdns

Run this command in Command line (run it as administrator).

Method 3: Reset the network stack

For a complete cleaning, follow these steps in order:

netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns

After this, restart your PC.

⚠️ Attention: On laptops with adapters Killer Networking (for example, on some models MSI or Dell) After the reset, you may need to reinstall the drivers. Download them from the manufacturer's website in advance.

Clearing the Wi-Fi Cache on macOS

On MacBook And iMac The Wi-Fi cache is stored in system files. To clear it:

Method 1: Deleting the network

1. Open System Preferences → Network.
2. Select Wi-Fi in the left menu, then click Additionally.
3. Tab Wi-Fi → Find your network and click – (minus) to delete.

Method 2: Clearing system cache files

Open Terminal and run the commands:

sudo rm /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
sudo rm /Library/Preferences/SystemConfiguration/preferences.plist
sudo killall -HUP mDNSResponder

After this, restart your Mac.

Method 3: Reset the Wi-Fi module

If the network keeps disconnecting:

1. Turn off Wi-Fi.
2. Open Terminal and run:

   sudo ifconfig en0 down

3. Wait 10 seconds, then run:

   sudo ifconfig en0 up

(Replace en0 on en1, if you have multiple network interfaces.)

Clearing Wi-Fi Cache on Smart TVs (Samsung, LG, Sony, Xiaomi)

On Smart TV Wi-Fi cache is often the cause of errors IP conflict or the endless "Obtaining IP address" error. The clearing method depends on the manufacturer.

Samsung (Tizen OS)

1. Open Settings → General → Network.
2. Select Open network settings → Wi-Fi.
3. Find your network and click Delete.
4. Please reconnect.

If the TV freezes during the connection stage:

• 🔌 Turn off the TV power for 1 minute.
• 🔄 Reconnect to the network.

LG (webOS)

1. Go to Settings → Network → Wi-Fi connection.
2. Select your network and click Delete.
3. To completely reset network settings: Settings → General → Reset settings → Network reset.

Sony (Android TV)

Likewise Android-smartphones:

1. Settings → Network & Internet → Wi-Fi.
2. Select a network → Forget.
3. To reset DNS: Settings → Network & Internet → Advanced → Private DNS → select Automatically.

⚠️ Attention: On TVs Xiaomi Mi TV After resetting your Wi-Fi, you may need to re-pair the remote (if it was connected via Bluetooth over the same network). Check how to pair the remote manually beforehand.

Common mistakes and how to avoid them

Clearing the Wi-Fi cache seems like a simple procedure, but many users make mistakes that only make the problem worse.

Error 1: Resetting the router without saving settings

If you have completed Factory Reset on the router, but did not record:

• 📝 Data for connecting to the provider (logins, passwords, VLAN ID).
• 🔧 Port settings, DMZ, parental controls.

— you will have to call support or restore the configuration yourself.

Solution: Before resetting, take screenshots of all tabs in the admin panel or export the settings (if the router supports backup).

Error 2: Deleting all networks on the phone without linking to the cloud

On Android When resetting network settings, the following are also deleted:

• 🔑 Corporate Wi-Fi passwords (if they are not synced with a Google account).
• 📱 VPN and proxy settings.

Solution: Before resetting, check if password sync is enabled in Settings → Google → Account → Sync.

Error 3: Ignoring firmware updates

If the problem returns after clearing the cache, it may be due to outdated router firmware. For example, TP-Link Archer C20 with firmware 2018 conflicts may arise with modern devices Wi-Fi 6.

Solution: Update the router firmware via the admin panel (section System Tools → Firmware Upgrade).

FAQ: Frequently Asked Questions

How often should I clear my Wi-Fi cache?

Clearing the cache is only worthwhile if problems arise, such as a slow connection, authentication errors, or frequent disconnections. It's not necessary for preventative purposes—modern routers and devices manage the cache automatically.

Is it possible to clear the Wi-Fi cache without restarting the router?

Yes, you can clear it on most routers. DHCP cache or ARP table without a full reboot. For example, on Keenetic this is done in the section Diagnostics → Clear CacheHowever, for a complete reset, a reboot is still recommended.

Why did Wi-Fi become even worse after clearing the cache?

Possible reasons:

• 🔌 The router is overheated (check the ventilation).
• 📡 Neighboring networks use the same channel (change the channel in the router settings).
• 🛠️ The cable from the provider is damaged (check the indicators on the router).

If the problem appeared immediately after the reset, try restoring the old settings from a backup (if you have one).

Should I clear the Wi-Fi cache on all devices at once?

No, this isn't necessary. Start with the device experiencing the problem. If the issue affects the entire network (for example, no devices connect), clear the router's cache.

Can clearing the Wi-Fi cache affect internet speed?

Yes, but usually for the better. Clearing outdated DNS records and the ARP cache can speed up your connection to websites. However, if your router is using suboptimal settings (such as automatic channel selection), speed may temporarily drop after resetting. In this case, manually configure the channel and bandwidth in the admin panel.