Ok I know some of you sharpen your squeegee's and get more miles down the road out of them, me I just replace the rubber (squeegee sharpener might be in my future), but anyway today I changed the rubber and thought about flipping the squeegee over and using the other side but it has those ridges in them from being clamped in the holder. Before I toss these would there be any problem using that side? I think my biggest problem is the look or could there be some damage there I don't notice from being clamped in on that side?