Mui has a very high cleaning and disinfecting ability. Try putting a handful of mui in a dirty toilet, you will see a surprise.
The toilet used every day will be covered with dirt and yellowing, very difficult to clean. Not only does it cause loss of aesthetics but it also poses a potential risk to health.

The actual treatment is not as difficult as you think, just a handful of mui is all solved.

How to whiten black and yellow toilet bowls with sponge

Sponge has a very high cleaning and disinfecting ability, so using sponge to whiten yellow toilet bowls is an extremely reasonable solution.

How to do it: mix 1 cup of sponge into half a cup of clean water to create a thick mixture, then pour it down the toilet and around the toilet bowl so that the sponge water comes into contact with all the dirty objects.

Continue to wait for about 30 minutes and then use a brush to scrub the toilet again and you're done.

With this method of whitening the toilet with a sponge, you won't have to spend too much money and effort, but the results are very high.