Hey my rear view morror came off a few days ago and now it dosen't want to seem to go back on. Does anyone know how to fix this irritating problem. It slides back on but it is really loose and when i drive and hit the bumps i just rattles off yea this is real annoying. Help Please

 

did the whole mirror and the bracket come off?

 

just the mirror the bracket is still on the windsheild. i put it on there again but it just shakes like a salt shaker. it is quite annoying. Please help