Is there a way to clean out your PM's all at once?

You have to clean out the sent and Recieved at a different time.. is this what you mean?

You can select all your messages by checking the checkbox on the top right of the list, then select Delete from the dropdown at the bottom of the list. You have to do one page at a time, but that'll take out ~30 at a time.

Thanks Chris. That worked!