Read the guide here to explore the steps to clear Facebook search history on an iPhone. If you don’t know how to do that, make sure that you have an active internet connection on your iPhone. Then follow the steps to clear your Facebook search history on the iPhone app. First of all, open the Facebook app. Then click on the search icon and click on Edit to answer how to clear Facebook search history on iPhone. Then, tap on the “Clear Searches” option to clear the search history on Facebook