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First cut off the water source of the toilet tank, press the flush button, and there will be no water.
Wash with a brush and rinse with water to clean.
Open the lid of the cistern at the back of the toilet, the lid of the cistern is generally a ceramic lid, and pour a piece of vinegar into the toilet cistern.
There must be two small holes on the back of your toilet that are not sealed properly, and it is okay to seal the two small holes with glass glue.
The fundamental solution is to change the toilet. Nowadays, some toilets are very water-efficient, as if a little water can flush the dirty things clean. >>>More
It doesn't matter if it's dirty, our skin can cope with this level of pollution, as long as we wash it afterwards and don't get sick from the mouth.