How to Delete Facebook Messages You Sent
Step 1: Check in to your Facebook account.
Step 2: Click the "Messages" switch in the menu on the delegated open the Messages web page.
Action 3: Click the conversation which contains the sent messages you intend to remove. Facebook presents conversation strings in day order with the most recent at the bottom of the page.
Tip 4: Click the "Actions" button at the top of the conversation display.
Tip 5: Select "Delete Messages" from the pull-down menu.
Step 6: Click to make it possible for the check box close to each sent message that you want to erase.
Step 7: Click the "Delete Selected" switch then click "Delete Messages" in the confirmation pop-up window. Facebook eliminates the selected messages.
Idea: To erase an entire conversation, including all received and sent messages, click the "Delete All" option after opening up the "Delete Messages" display.