I was cleaning my 2018 ford f250 windshield in my garage when i noticed that the passenger wiper arm felt loose. i went over to check the drivers side and gave it a wiggle and noticed that the key way fell out from the bottom of the wiper arm where it connects to the shaft to make your wipers move. i then went back over to the passenger side a noticed the key way laying on shroud at the base of the wiper arm.