Hi guys and girls! Was washing the car the other day and noticed that a little flake of rubber had fallen off of the window seal as u get in the car. It also looks very discoloured and not even a little back to black did anything! It's only a little chunk and not many people would notice it but i do!!! Is it easy to change the window seal? And most of all, is it worth it or will it probably happen to the next one i got? Cheers!