Open the Facebook app
Tap the menu icon
Scroll down and tap Settings & privacy
Tap Settings
Tap Browser
Tap Clear browsing data
Confirm the action
On Android, go to your phone Settings
Tap Apps
Tap Facebook
Tap Storage
Tap Clear cache
On iPhone, delete and reinstall the Facebook app to clear app cache
To clear Facebook cache in a web browser
Open your browser settings
Clear cached images and files
Refresh Facebook and sign in again