So I bought the light block and have had nothing but trouble. It marred my wife's CX-9 and a test spot on a GTI. I tried it with ONR clay lube and other dilution ratios, even cutting the block in two (as I read from Detail Chick) and still did nothing and was skipping all over the place. After I did a panel, I went back over with Clay Magic blue and it removed a ton more. Both cars were light on contamination. Any other tips so I know I didn't waste my money? All their other products have worked well for me so I want to give it a fighting chance.