A buddy always smokes in the toilet, and when he goes in, it smells of smoke, and he doesn t listen,

No, right, the smell of the toilet shouldn't have much to do with that person, and after a long time, there are more people on it, and it will naturally stink.

If he doesn't rinse when he urinates, he may feel that it is a bit of a waste of water to flush every time. You can't say that your father has repeatedly taught him, how can a child educate his parents? You can only gently persuade him: >>>More

Then you can go to the toilet every morning than Dad.

This will not delay you from going to the toilet. >>>More

Technology --- mosquito repellent lamps, mosquito coils, etc. >>>More

There's nothing bad about it, and there are a lot of designs like this in your home.