Originally Posted by RoadDawg

Whoa Nellie!... DON'T do it. WD40 is a compound that was designed to displace water. Thus the name = "Water Displacement Formula 40". (They tried 39 other formulas before finding one that worked) It is NOT a "long term" lubricant and will gum up the works if left in the switch. While there are many uses for the stuff, spraying it into locks and switches will have a negative result as it will leave a gummy residue that will get caked up with dust and cause the part to fail again. Use an electronic contact cleaner to clear the part and then a silicone based lubricant to follow up.

Don't ask me how I know