Ok here goes. First Kwikee (for the most part not all brands)(in case of Alpines I believe all) should be lubricated every 30 days according to the manufacturer. Make sure you turn off all power to the step (extended) before you do this work, as if it should retract, it does have the power to cut off a finger. You lube all the joints/pivot points you can get too. There may/should be a cover over the motor/gear assembly; this also needs to be checked, as part of the step assembly wiring, there is a circuit built in so the ignition makes the steps go in, if the door is closed, either engine on, or just ignition switch in the on position. In mine the ACC position has no effect on the step.
Depending on use, the motors can wear out, which get slower over time, worse if you don't do the maintenance stated above. I believe Kwikee, has be bought out by someone else (but don't quote me), but their website has lots of information, manuals, and lubrication information for your model. You can use any good grade of light machine oil, you don't need their oil.
Now with all that, I do my step about once every six months and have not had any issues with it. I usually do it, once in the winter and when in the summer I change the coach/generator engine oil and filter. I also lubricate the screw drive mechanism on the Generator slide then as well, but that one I do 4 times a year.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech