Clearcare is not generally used for RGP's. If you have a 'build up' on your lenses and use a protein remover, and the haze is still there, IT'S NOT PROTEIN. Their are several different things that CAN build up on any CL. The next likely is 'calcium'. You can soak your lenses in protein remover for a week and it will do nothing to calcium. The best solution to the problem is usually the Alcon Daily Cleaner for RGP's.