How do you turn white with yellowing on a white toilet seat? Who can teach me

Look at your weight, normal people are generally fine.

I'm an architectural designer, as long as the quality is not too poor, there will be no problem, but the plastic will age.

Probably not, not so unpressed. As long as it's not particularly strong.

If the toilet lid is opened when flushing, an instantaneous cyclone in the toilet bowl can carry germs or microorganisms up to 6 meters into the air and suspend them in the air for several hours before landing on walls and objects. Nowadays, in most families, toileting, washing, and showering are carried out in the bathroom, and toothbrushes, mouthwash cups, towels, etc. are shared with the toilet, which is naturally easy to be contaminated by bacteria. Therefore, it is important to get into the habit of closing the toilet lid when flushing.

If you can't solve it yourself, it's better and more convenient to call the property to deal with it.