Reset/Cancel button no longer works on remote

Its pretty easy to clean the inside of a remote control. Its a bit hard to open it, its mostly clip usually sometimes with a few screw, usually in the battery door if there is. Use glasse flat screwdriver to pry and split in two the box... Just lil patience, pry here and there and youll soon find the way to do it. After its open, you have to clean the rubber pad with hot water and soap and scrub it gently with a cloth. Clean the electronic side with rubbing alcohol and cloth, rub the black carbon contact a bit more... Good luck!