12oz (342g) Glass Boss Nothin's Better Water Spots Be Gone Water Stain Remover (new and improved) Paste.
From the manufacturer:
Cleans, seals and leaves protective coating. Glass, chrome, porcelain, tile, aluminum, and stainless will shine and sparkle as new for months. Remove water mineral stain, rust, scum, paint overspray, oxidation.
Directions:
Dip a thick damp cloth in the past. Rub briskly on small palm size areas. Glass will squeak when clean. On obscure glass shower doors, toilets, tile, or porcelain, use a nonabrasive nylon pad. For stubborn stains use a slightly damp applicator. Rub until smooth, let dry. Wipe and buff with a dry cloth. Repolish as needed. Do not use on shiny auto paint, plastics, plexiglass, formica, silver, brass gold, bathtub floor, or shower pan (it's slippery). Always test a small area first. Keep out of reach of children. In case of contact with eyes flush with water for 5 minutes. If ingested, do not induce vomiting. For any symptoms that develop, consult physician.
Ingredients:
Microllite(TM) polish; no harsh chemicals, dye, or perfume. Not animal tested. Biodegradable and nontoxic.