*What’s needed :
White vinegar for cleaning (this alcohol vinegar is a little more acidic than normal vinegar and more effective)
A toilet brush
*How to remove hard water stains in the toilet?
1) Remove as much water as possible from the bottom of the toilet.
2) Replace this water with vinegar, letting a good quantity flow (it is necessary to cover the stains at the bottom of the toilet). You can heat vinegar beforehand to boost its effectiveness. This will be even more descaling against lime stains in the pipes and at the bottom of the toilet.