POWERFUL BLEACH: The bleach-based formula in USKICH toilet bowl cleaner tablets effectively removes stubborn stains, urine scale, hard water buildup, and grime from the toilet bowl surface. DEODORIZING: Household Toilet cleansers clean and deodorize with every flush to leave the bowl crystal clear, If you feel the smell of bleach every time, don't worry, it is the powerful cleaning ingredients functioning. LONG-LASTING FRESHNESS: With sustained release technology, each Toilet Bleach tablet will continue to freshen your toilet bowl for at least 15 days, during which time it forms a protective film that prevents stubborn stains from sticking. EASY APPLICATION: BRUSH THE TOILET BOWL FIRST BEFORE EACH USE! Simply drop a tablet into the toilet tank and let it do its work. No need for scrubbing or applying a liquid cleaner. NEUTRAL INGREDIENTS: Our toilet tank cleaner tablets are crafted from neutral, dye-free ingredients, each piece is individually packaged and will not come into direct contact with the skin and pose no risk to any metal or plastic components in your septic tank system. EFFECTIVE IN CLEANING - Effectively help you clean the tank, water pipe and other parts of the toilet. LONG-LASTING - Each toilet cleaner tablet lasts up to 15 Days (or 20 flushes daily),20 tablets are for 10 months supply. BTW, each toilet tablet's lifetime may vary. HOW TO USE - DO NOT tear off the blue outer protective film, which is soluble in water tank directly. Please leave the toilet tank cleaner in the water tank for at least 1 hours to dissolve sufficiently until water gets blue before flushing. POINTS FOR ATTENTION - When the blue toilet bowl tablet dissolves completely, the blue will fade, a new toilet tank cleaner should be put into the tank. This product cannot completely replace the toilet brush. It is mainly to help maintain a clean toilet tank and reduce the dirt accumulation on the tank. Please clean the toilet tank with a toilet brush before the first-time use, so as to make a better use of this product. CONVENIENT AND EASY TO USE, toilet cleaner is convenient and easy to use. It will not cause any damage to the internal parts of the toilet tank.