Noisy electric jacks

Hate to say it but it's usually the bearing/bushings in the end (where you rotate it) that gets noisy and rough. There's not much you can do for them. Lubricating them with an oil will help some but to really correct the situation they'll need replacement.
FWIW, the higher rated jacks have better bearings in the ends.

If you look at new jacks in the box, you'll find that contrary to what people on the forum say, the manufacturers pack them with heavy grease.

I use silicone spray (occasionally).

I would clean all old debris off with brake cleaner and then apply a silicone spray

Clean off and use silicone spray.

I use a graphite spray lubricant. Goes on wet, but retains it's lubricating proprties when dry, and doesn't attract road dirt.

A drop of Mobil-1 5w-30 from a zoom spout bottle goes on everything including stabilizers, shackles, leaf springs, coupler etc to keep thing quiet.

shenandoahvalley wrote:
The stabilizer jacks on my Jayco have gotten noisy when extending and retracting. What can I use to reduce the noise but not collect dirt?

Krown Penetrant products are superior for this application ... been using aerosol spray for years on anything that squeaks, including the stabilizer drive screws. Dead simple to apply, doesn't attract dirt, a Canadian product but sold in the US as well. :B

Electric jacks? Scissors jacks? Swing down jacks? Using power drill? Hand crank? Other?

Nice part about Krown and Fluid Film, the US equivalent, is that they penetrate the pores of the metal. This make them very resistant to washing away. Lots of other lubricants just sit on top of the metal and quickly wash away after going down wet roads. Fluid Film can be found at Lowe's.

While you could and should lube the exposed parts with a dry lube, I'm inclined to think it's the motors as one person has mentioned. For $4, you could buy a mechanic's stethoscope at Harbor Freight and pinpoint the source of the noise.