My back windshield wiper keeps getting stuck in between my tailgate and the glass. Does anyone think getting a new wiper would help? Or is it just something stupid that Blazers do that I need to get used to. The wiper looks pretty worn, but the rubber strip is still in one piece.

 

It sounds like the whole wiper arm may have been removed completely once and was reinstalled incorrectly, try popping the whole arm off and reinstall it at a higher point on the window..if that doesnt work then maybe someone replaced the wiper motor and put that in wrong..