Jayco Designer Slide Out Problem

My slide had been creeping out over the last 3 years. I had the rams replaced, a new valve, nothing seemed to work. Lippert sent out a technician while we were in Arizona over the winter. He came to the conclusion that I had air in the system and said to put a quart of anti stiction fluid in the hydraulic tank. 1100 miles towing home and it didn't move at all. I haven't been out since, but sure hope that is all it was.
You didn't say whether you had hydraulic or electric slides. Obviously this won't help you if you have electric slides