I don't think its a cleaning issue , its a to much weight issue
I don't know how your camper is optioned , but the one I had and got rid of -had a polarcub , upper cabs , solar , sat dish, luggage rack -never put anything in it . Ordered it new , asked Bob about the lift system and if it was ok with all this and the extended cab roof , he said , it was , it wasent .It bent the arms coming off the heco system , ate teeth , destroyed lift cranks . I have had 2 northstars with that system , no issues . I called heco , they said it was not rated for that much weight . Bob said he could put torsion in the front , may help , at the time they were developing the electric lift , he said he could put that on . After retuning it for a blowen out basement to Colorado , and other issues I sold it with Bobs help for a 7 thousand dollar loss , the new owners didn't know the prob but were being pushed twards a power roof .
I found if you push up with your back to help the roof raise for the first 4" or so it takes a lot of the weight off the system and is easer to lift , I also kept a bag of spare parts with me and a few extra cranks