Cleaning the toilet at school is very pungent and something

Toilet cleaner. It's not yellow-green, it's pale blue, and it looks yellow-green when it reacts with the dirt of feces and urine.

There's no way, you throw it everywhere when you pee, and it's even worse if you don't clean it up, bear with it. It was very acidic, and of course it tasted pungent.

Chlorine-containing disinfectant for cleaning and disinfection of toilets.

Oxalic acid is generally used, and the smell is unpleasant.