Lysol Hydrogen Peroxide Toilet Bowl Cleaner uses hydrogen peroxide to dissolve even the toughest toilet stains. This powerful new cleaning formula uses hydrogen peroxide to release thousands of micro-bubbles that dissolve tough toilet stains. This lime scale remover even cuts through lime scale, without the harshness of bleach. Lysol Hydrogen Peroxide leaves behind no chemical residues: just a clean, fresh, scent. The thick formula clings to the bowl, brightening your toilet as it cleans and disinfects. The angled bottle targets hard-to-reach areas, including under the rim, leaving your entire toilet bowl sparkling clean, deodorized, and disinfected.To clean and disinfect/sanitize: Flush toilet before cleaning. Apply 4 oz. to coat the bowl including under the rim. Do not close lid. Let it sit for at least 10 minutes and then brush entire bowl to wet surfaces thoroughly, including under the rim, and flush. Rinse brush in fresh water after use. Repeat if necessary