Not to be used on new glass; Use only on tough stains as necessary. Wet area with cold water, then apply generously to inside of shower glass starting at the top and working downward. Most stains gather toward bottom, spraying extra amount as necessary in these areas.
Allow to set on glass for 3 to 5 min, then apply with soft plastic bristle brush, or loufa scrub in circular motion starting from top to bottom. Rinse and repeat as necessary. (Nano Coating Protection products may be applied, but not as effective as with New Glass)