There are two ways to clear Messenger's cache, depending on whether you're using an Android, or an iPhone or iPad.

You can create a "secret conversation" in Messenger by starting a new conversation and tapping the lock icon in the top-right ...

Fix common issues with Facebook Messenger and ensure your messages are delivered without hassle Reviewed by Jon Fisher Check ...

If you’re one of the billion or so people who use Facebook Messenger, you might notice a change in the coming days — if you’re an Android user, that is. As first reported by Android Police, it would ...