Other Useless Info. Dept. --- many moons ago doctors would inject silicone grease as cheapo substitute for breast implant surgery (many old stories on 60 Minutes, etc.) The grease form was almost pulled off the market; silicone oil is widely available since it is used as fuser oil in copiers. That is the lubricant smeared on the heated fuser roller that bonds the toner to the paper in the copy process.
It should be non-conductive and forms a water resistant barrier. Liquid silicone spray is also available in spray cans, and is the most widely used form for electronics and automotive applications. Last resort as lubricant to stop squeaking and screeching as parts move (in case WD-40 does not work or would produce odor).