How To Clean Your Potentiometers
If you play racing games long enough with the same steering wheel and pedal set you inevitably come to a moment when some of the precision is lost and random, sudden movement of in-game controls is noticed. The car turns on its own, the throttle pauses for a moment before suddenly revving up, brakes locking up even if you’re being smooth, and so on. The reason for that is, although all mechanical parts wear out with time, what often suffers first are the potentiometers.
Potentiometers are the heart of your steering wheel and pedal controllers. They are small round-shaped (mostly) mechanical or optic devices, that converts and transfers the physical input from you to controller’s mainboard and thus to the system, so it can be analyzed and used by the racing game. That is done by measuring the resistance depending on how much the wheel is turned or how far a pedal has been pushed.
Unless you own one of the top wheels available out there, which come with very expensive set of potentiometers that are guranateed to last for a very long time, or if your model uses an optic pot that virtually has no wear whatsoever, the chances are you would end up with a dirty and eventually, worn out potentiometer. But not to fear because you can prolong the life of your pots by at least a double.
The importance here is to identify your potentiometer is the cause of the erratic movement, with slow then fast reactions (spikes) of the steering, throttle, braking or clutch (if you have a clutch pedal). Once you’re relatively sure the problem does not originate from your game settings or drivers, you have to figure out carefully how to open your wheel or pedal set, unless of course you haven’t done it before. It depends on the brand and model of the controller, so there are no general rules here, but it usually involves the use of a simple screwdriver to remove the bottom cover and then observe the internals until you spot the potentiometers. Remember, they look like little round knobs and are mostly connected directly to the movable part of the controller through their shafts.
The majority of pots have a little hole on their back and unless they’re completely covered, you’d be able to clean them without having to detach and open them. The idea here is to clean the track inside that does all the resistance measurement, so spray a little WD-40 or graphite-based cleaner through the hole, then move the corresponding controller a couple of times to spread the fluid. If you have to open the potentiometer to reach the track that needs cleaning, be extra careful not to detach any wires and not to break the pot’s casing. It usually has little metal legs that you need to bend a bit before you can pull it apart, then after cleaning the track (be careful not to scratch it!), you have to push them back so it’s closed up properly and put the pot back in its nest, connecting it with the movable part.
It must be said that despite the efficiency of cleaning a potentiometer to prolonging its life, the mechanical wear eventually reaches a level when it simply becomes impossible for it to function as it should. Due to the fact that the layer of material onto the track inside that provides all of the resistance measurement simply becomes too thin and doesn’t provide good contact with the shaft’s pins. But as I said, it takes a lot to reach that state, unless we’re talking about steering wheels and pedals that use cheap crappy pots.


