Upgrade RV Window Seal - 0.5 x 0.275inch Waterproof Rv Rubber Seal Strip, Car Window Glass Edge Weather Stripping, Windshield Locking Gasket for Camper Marine Boat Truck, 40FT

Well there's not much of a question there, or information about how old your RV is, or anything. Those seals do shrink over time, and can be replaced, one example that I've heard was effective is this one here from Amazon: https://a.co/d/08BifG29