If there is any product left in the vaporizer, use it to clean the steel! In fact, among the best solutions to make it shiny, vinegar and lemon are the best!

NB  I remind you that the following remedy cannot be used if you have marble or natural stone ceramics.

Hydrogen peroxide

Finally we can also use hydrogen peroxide  to  remove yellow toilet stains .

First of all, you will have to get some 3% hydrogen peroxide, i.e. the 10 volume one, the classic one from the supermarket!