Hmm. Maybe temporarily. I've never had lasting results from doing that. Usually, if dirt that got in there, not only is it dirty (duh), it also probably scratched up the resistor and you'll still probably get erratic behavior.
stuck in bed tonight, can't test. Excellent idea though, using the steering channel. I've had luck cleaning pots in old stereo volume knobs, i guess it's worth a try.
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It's "Dr. _paralyzed_" actually. Not like with a PhD, but Doctor like in Dr. Pepper.