We had new corian counter tops installed in the bathrooms last year. I'm having problems with water spots on them and my Virex 256 and Stride doesn't do much to remove them. Our water is very hard so we have pumps that inject chlorine and phosphate into the water line. Knowing this what would be the best way to remove these spots? We have Liquid Creme Cleaner made by Regency Professional, would this be ok to use on them every once in a while?