Slide Top Seal Partially Deploys and Allows Water to Enter

I have a 12' living room slide on my motorhome. The slide has dual seals along the top and on both vertical sides to keep the elements out. When setting up at the camp site, both the inner and the outer seals are made so that when the slide is extended, they lay flat with the seal "knife edges" pointing out from the coach to form a flat seal against the walls of the slide. Invariably, however, they will not fully extend with the slide so that in some sections the knife edge is still rolled or curled inward. On the vertical walls of the slide, it's easy enough to get between the slide and seals to get the edges of the seals to point out and lay flat. The roof seal is another matter, however, because of the slide topper. The result of this curled in condition for me has been that in driving rain storms, the water on the top of the slide works its way along the top seal until it finds the rolled in section, and then starts to drip inside the motorhome.

I'm thinking that I need to affix a slightly angled rubber strip, or series of plastic or rubber "bumps" (for lack of a better description) onto the roof of the slide to progressively nudge the seal outward as the slide extends. I'd use an adhesive of some type to permanently adhere this to the roof. Key is also to not tear up or wear the seals in the process.

Has anyone addressed this problem themselves? Does this sound like a plausible fix? I'd sure like to hear your opinions or different solutions. Thanks.