Slideout rubber edge question

Is there a particular lubricant anyone recommends to spray on the large rubber slide seals? It seems that sometimes they don't "deploy" all the way out- I mean they're sort of folded on themselves when the slide is out. I thought about WD40:)
But seriously, is there a need to do this so the friction of the slide passing against the rubber weather edge is reduced and if so, what do you use?

thanks