2018 Sienna SE Rear Passenger Door Window goes down on its own

Was coming home yesterday from a 2 hour drive and the last 30 min the rear door window was rolling itself down. A while back I noticed some troubles rolling that window up from the master switch is what I suspect is the problem. Can the master Switch be cleaned or does it just need to be replaced? I activated the lock on the latter switch and it still rolled down which should eliminate the switch on the rear door.
any help is appreciated.