spray lube for jacks?

Here's a trick I learned from a really sharp mobile tech. If you coach has set for any time, before retracting do this. Move your jack contoller to manual, raise each jack slightly an inch or so, then retract the jacks. Reason is that if a coach has sat for awhile the seals and the exposed jack may have dried out, even slightly. Just dropping the jacks may "roll" the seal and hence causing a bigger problem. He also recommended using spray silicone for jacks exposed for a long period. NEVER use any type of oil as it will attract dust and dirt. Silicone dries quickly leaving a dry lubricant behind.