Stix Toilet Bowl Cleaner combines 20 percent phosphoric acid, detergents & wetting agents to quickly remove hard water mineral deposits, scale, rust, soap scum & filth from restroom surfaces. Use as directed to clean toilet bowls, urinals, sinks, other porcelain surfaces & shower tile. Cleaner is pleasantly scented with a cherry almond fragrance. It is ready to use & easy to use. After flushing, simply open the pour spout 45 degrees & squeeze the bottle to coat surfaces under the bowl rim. Let stand 10 minutes before scrubbing & then flush to rinse.