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The only big trick is to dismantle it, see if it is fixed by screws or fixed with glue underneath, find a flat-mouth screwdriver and slowly beat it down, you can remove it from the toilet bowl and see what is blocked.
I've tried it before, but it's hard to solve it by myself, find a professional toilet, and get it right at once.
There are monopolies in the market.
Spray the rust remover. >>>More
Take the mop and plug it tightly, then fill it with water and pull out the mop in an instant.
Tools Raw Materials: Toilet brushes, plastic wrap, plastic bags, plastic bottles, scissors, rubber gloves. >>>More
Why don't you try pouring a bottle of vinegar, and then don't flush it yet, and wait until tomorrow morning to get up and flush it again, and then call a pipe dredger.