1. Open your Android's Settings.
2. Tap 'Storage & Memory'. Depending on your current software, this option may also be named 'Storage & USB'.
3. Tap the 3 dots in the upper right corner and select 'Advanced'.
4. Tap 'Storage' and then 'Internal Storage'.
5. Tap 'Cached data'.
6. Tap OK.
Cleaning Cache on Older Android Versions:
1. Open your Android's Settings.
2. Tap Storage & USB.
3. Tap Cached data.
4. Tap OK.
Note! You may lose your custom settings in some apps when clearing all cached data.