If you have a tough mineral stain that won’t budge, try these solutions. Drain the bowl and rub with a paste of Wendyl’s Green Goddess Premium Borax and a little water. Leave as long as you can, then wipe off.
Spray Green Goddess Double Strength White Vinegar around the inside of the toilet and under the seat or anywhere stains and germs may be hiding. Leave for ten minutes then wipe clean.
Put a cup of Double Strength White Vinegar into the bowl and leave over night if stains still won’t budge, clean as usual.