To answer my own question, yes they are possible to clean. Once you get to the little modules, the top will snap off by inserting a screwdriver in the notch on each side. Once open, it's easy to see where the electrical contact is made on each side when the lever is moved. I cleaned each side of the contact with sandpaper then sprayed it out with electrical contact cleaner. Between my two seats I had 4 different functions that didn't work, now each one does. Considering a new seat switch is $130, it was definitely worth my time.