Our toilet bowl cleaner contains sodium percarbonate, baking soda, and lemon extract. It effectively removes stubborn stains, removes residue, and kills 99.9% of household bacteria. It flushes the toilet bowl from all directions. The concentrated solution dissolves evenly, automatically removing dirt. It effectively deodorizes and maintains the fragrance. It's suitable for all types of toilets and is non-corrosive and non-toxic. Usage is simple: unscrew the cleaner cap. With the base facing up and the liquid facing down, screw it directly onto the base. Open the tank cap and quickly lower the bottle into the tank. When you flush the toilet, the toilet bowl cleaner automatically releases to clean. The solution is metered and can be used for approximately six months. It effectively deodorizes and maintains the fragrance, providing continuous cleaning, long-lasting deodorization, and removal of stubborn stains.