I posted this under another topic in a discussion about Skill games and it didn't get much attention, figured I'd try a separate topic on it:

I have a Skill-Score and of all my EM machines, its the one my youngest son like to play the most. A really great game. Several years ago I found it non-working with no backglass and had to first figure out what it was, then bring it back to life. Just a quick question since a lot of people here seem to have similar machines, the Skill-score has the plinko style wiper arms that the playing disk pushes down as it slides in the columns to score. No matter what I do or how many times I've cleaned these things, they always seem to stick. For those not too familiar with Skill-Score, there are essentially 3 rows of 10 of these wiper arms switches, they are all tightly wired in the back and not really easily removed for soaking or other methods of cleaning. Has anyone had success or is there some good option for keeping these free moving? I know lubrication is usually a big no-no on EM machines.
Thanks