Anyone who has had an RV for any length of time eventually has issues with their Kwikee electric stairs. At the age of your RV, you do seem to be unlucky. I try to minimize the number or times the stairs extend/retract, when possible. Hitting a fixed object with the stairs extended WILL easily bend/jamb them which leads to early failures of the drive mechanism. The stairs live in a hostile wet and dirty place and regularly get sprayed with road debris so keeping them clean and lubed is always a plus. If you can shield the electrical components/connectors from moisture, that can only help. Hopefully your luck is about to change.
Chum lee