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It is very likely that there are pipes leaking under the floor or adjacent to the ground, which seem to be backwater.
The key problem is to find the source, such as animal carcasses, if it is a sewer running in, it means that there may be animal carcasses or a large amount of dirt gathered in it, first use a large amount of boiling water to try it, it is really not possible to fill it a few more times, and then check whether it is unblocked, and if the sewer is not smooth, you have to dredge the sewer!
Because the toilet drain is fitted with a part called a "check valve"!
There is a valve control. You and the installation company to understand how to disassemble and install.
Gnats (also known as midges, butterfly flies).
It is a common flying insect in toilets, toilets, and toilets. >>>More
The socket is flooded and the power is jumping. The one that is pressed once a month has not jumped.