How to Erase Facebook Search
Note: These screenshots were caught in the Facebook application on iphone.
Tip 1: On your News Feed, touch the Search bar on top of the screen.
Tip 2: Faucet "Edit" near the top-right edge of the screen.
Tip 3: Tap "Clear Searches."
Tip 4: Faucet "Confirm" to clear your search background.