How do you clean the toilet main?

First of all, check whether the sewer is clear and whether there are any foreign objects affecting the drainage. If there is a blockage, you can pour an appropriate amount of alkali into the sewer, which is more effective in removing grease and rust from the pipes. Secondly, if the sewer is not blocked, but it returns a peculiar smell, you can use the principle of water sealing, fill a thin plastic bag with clean water, seal the mouth of the bag, and put it on the mouth of the sewer to cover it tightly, so as to seal the odor.

In addition, it is best to keep clean water in the bowl-shaped water reservoir structure at the sewer mouth at the same time, so that odors can be more effectively prevented.

There is a special pipe cleaning liquid, pour it down, it seems to be to remove scale, stains, you can go to the supermarket to ask!