Service center recommended Pledge furniture polish, has worked well for me for the last 2 years.
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Danny & Linda
Full-timed 10+ years
Former '13 FB owner
Traded '13 GMC Denali DRW D/A
Currently rv & truckless
Replacement undetermined
Baby powder...apply some onto a cloth and wipe the surfaces of both the D-shaped seals as well as the sweep seals that rub against the sides of the slides. Then wipe again with a cloth without powder to remove the excess residue.
Been doing this about every 3 months or sooner if I notice any sticking/squeaking when operating the slides
I use silicone on everything. I haven't had any problems up to this point.
Dave, silicon is also a very common method of lubricating the rubber seals, if you use this method it is also advisable to wipe down the seals with a clean cloth to remove any excess. After treatment all seals should be dry.