Slideout not fully extending

My bedroom slide on my 09 Cambria would do the same thing but after a minute would slide out some more. Resistance was causing the motor to shut off on an internal protector (my guess) and once cool would activate again. I removed the bedroom pedestal and cleaned the slide as it was gummed up with sticky lubricant and dust. Once clean again it worked fine. I have had to do this a few other times, my guess is because I camp in dusty conditions in the desert and it manages to get in there. I even use non oily lubricants and those designated for slides.
Even though the slides appeared to be clean ,they were not. A stiff brush and some time solved the issue.