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Of course, it's not hygienic, usually wash your hands and rinse your mouth, spit and wash rags and the like on it, a lot of bacteria, it's best to wash it with water in a basin, or you just turn on the faucet and wash your face with your hands with the water that comes out of the faucet.
Regarding the problem of snot at the washstand, I personally feel that it should be okay, and I should wash it off with water in time after the snot is done.
There is no need for a door around the sink, but a toilet or shower in the bathroom should be installed.
It can be discharged into the drain pipe of the air conditioner. >>>More
It is also possible, but soaking is more conducive to sterilization.
As long as you have the space, of course you can.
And there is also a benefit, washing and size solutions can be carried out synchronously without interfering with each other. >>>More