Sticky slide seals?

So I’ve had the fifth wheel in storage and as soon as I brought it out I applied the 3 in 1 slide foam conditioner. Couple of weeks in the outer rubber on the slide has become sticky. I’ve washed them while fifth wheel with 303 and reapplied the 3-1 rubber protect.

I also read somewhere about using talc powder, any thoughts on how to remove the stickiness