2006 Fiat Punto remote fob got its own mind

hi, i waterr damage my remote fob last week. but after cleaning the fob components with electric contact cleaner, fob works but fob got its own mind and it unlock car randomely. it will unlock the car while driving it and also after locking the car if key fob goes near the car, it will unlock the doors, so don't know what else i could do here, will appreciate your help on this matter.
cheers.