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If it's not blocked, it's rushing down, and if it's blocked, just dredge it with a leather pick. It is sold in the supermarket.
Soak 84 liquid and rub it with a steel wool ball, you can also use vinegar!
Find a way to get revenge, if you hate him so much. Of course, I can't tell you exactly how to do it, as long as there is something, you can find faults. But it's better for people to be tolerant and it's not too much of a problem, just forget it, why bother with him! >>>More
Buy a bottle of Coca-Cola, sprinkle it all around, and you'll be ready to go.
To tell you a very practical cleaning method, spray the dirty places in the toilet with oxalic acid a few times, (oxalic acid can be purchased in chemical stores or hardware stores) after stopping for ten minutes, wipe it with a stainless steel cleaning ball a few times and it will be as clean as new, I don't tell him in general.
You don't have to worry about this, it won't clog your sewers.