It turns out that you can restore the toilet to perfect cleanliness quite quickly and without much effort.
You can rid your plumbing of plaque and rust using one simple mixture.
This remedy consists of inexpensive components and is incredibly easy to prepare.

So, you can make your toilet snow-white and shiny using baking soda and citric acid.
Super Toilet Cleaner
Take a small but deep container. Pour baking soda (2 tbsp) and citric acid (1 tbsp) into it.
Mix these two types of powder.
Next, fill the resulting mixture with plain water: one tablespoon is enough.
After mixing again, you will have an incredibly effective cleaning agent.
Apply it to the walls of the plumbing. Of course, the most "paste" should be on the dirtiest areas.
Next, close the toilet lid and wait 10 minutes.
When the time is up, all that remains is to “go over” the inner surface of the plumbing fixture with a brush, and then press the flush button.
As a result, the toilet will become clean and snow-white. This result will be achieved without complicated and tedious work.