I changed over to KR clearcoat sealant a couple of weeks ago and I am getting complaints about spotting. I have the final dilution ratio at 620:1 which is a little on the heavy side of the spec (600-900). I'm sure the customers are not using the rinse cycle after applying sealant but I never had complaints before with the old supplier I was using. Has anyone esle had any spotting complaints? Do I need to dilute it further?