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