there is a post either in these forums or from that "RV Repair Guy" you tube site.....sorry I can't remember.
Take an old gym sock, put it over your hand, sprinkle your finger tip area liberally (you will have to do it a few times throughout your effort) with Baby Powder and wipe down ALL your black rubber seals (bunk and slide) on some sort of schedule. I plan for twice a year and have noticed that the seals "slide" across things easily and don't stick.
Ed & Chris
Josh & Jaclyn
2012 Suburban LTZ
2013 Rockwood Roo 233S