pm sent mate cheers.

anyways this is my first dmd machine, and first with this opto board style flipper switch.
the flipper is a little twitchy very much the same as if a older style flipper switch wasnt making contact. so i got a cotton bud and cleaned the sensor, seemed to have helped a but still does it from time to time, are these opto boards for these machines cheap enough? or should i just keep cleaning it? what are people ideas do they just gunk up and die or they something that can clean up?