How to clean heater control

I would think that a plastic safe solvent would clean it up well.

My only concern is are there places that are lubed before assy that can not be lubed properly after cleaning.

Example...

I cleaned a window regulator in a tub of paint thinner.

A bit of a mistake due to the internals of the crank shaft. ( A anti rotate mechanism is inside)

After cleaning and lubing the contact points the crank sounded like a grinder

Either lube was removed or grit got inside.