2017 Gen 5 with low miles rear window will not roll up or down. it goes about 1/2 inch and will not move. I was able to push it up carefully to close on my last trip. It sounded like something is binding or sandy inside. after opening up the back panel I can see lots of sand from off-roading and cleaned everything out but the window still only moves only a 1/2 inch. I am thinking the motor might need to be replaced? tried looking for YouTube videos but did not find a gen 5 video. any other resources?