Hi.... I speculate you don't actually have to eliminate the thing. On the off chance that you utilize a mirror, you can presumably see the windings and an arm that slides over them. I bet everything are slightly grimy. You can clean them with WD-40 and a cloth (don't shower it on encompassing dashboard materials), or with Deoxit in the event that they are dirtier than that. Some other revered technique for cleaning them would simply be to "work out" the rheostat to and fro, to and fro - possibly 100 reps.