Sorry to hear that it is not working well for you. We do not offer this model with a plastic liner. This suggestion came from another customer: "Make sure the shower curtain is hanging INSIDE THE TUB. Take the FLAP, and INSTEAD of letting it hang OUT of the TUB AND BENCH, FOLD IT INWARD SO IT LIES ON THE BENCH, like you were going to sit on it. Let it fall PERPENDICULAR as possible to the bench, not swooping, like a pool slide. That way the slits in it will remain as closed as possible. Now, in order so that you don't slip when you sit on it, fold each of the corners where the magnets are in a triangular fashion so that your buttocks are ON most of the bench." If possible, try to use a handheld showerhead when washing up. That way you can always control where the water is going. Just make sure the hose is long enough for free movement.