s13whore

ok so my wipers work perfect and the motor is good and it randomly pops out of place so I have to the the wiper motor off and pop the joint in the arm, and it will work for a while but then it pops off again. the wiper arm is ok cause the little socket where it have to pop it back into place is fine. I am how every missing one of the screws that holds the wiper motor down but I tightened all the other ones real good but It keeps popping out of place. It wouldn't be a problem if it didn't rain but ill be driving and the windshield wipers get stuck on the up position until the motor catches the arm again. any suggestions are appreciated