Can I oil a push button light switch?
Oil, no. Lubricate, yes. Common oils have multiple problems for electrical devices, the worst of which is possible flammability. You can get specific electrical &quot;contact lubricant&quot; for this though. It is usually not sold in hardware stores, you may have to order it on-line and the smallest package will be a lot more than you need, but don't substitute. And to those who will tell you &quot;WD-40&quot;, that is NOT a good lubricant, despite what people think. It's main purpose is as a water displacement agent, in fact that's what the &quot;WD&quot; stands for (Water Displacer, attempt #40 is where the name came from). As a lube, it only lasts a couple of weeks before it breaks down and evaporates.
And NEVER apply any lubricant to an energized device.