Ultra Clean Spot Off is a heavy duty, HF acid based hard water spot remover that contains a space liquid pumice formula to help you get rid of pesky water spots. This is not designed to be used as a daily window cleaner, but rather as a product for when the water spots become too difficult or impossible to remove with conventional glass cleaners. 

Directions: Dilute 1 Part product with 4 to 10 parts water - Mix this solution in a polyethylene or plastic container - Apply to surface - Scrubbing or agitation will speed up the cleaning process - Work from the bottom up - Do not allow cleaner to dry on glass - After product is done, rinse of thoroughly with water