empty the entire bowl. You simply want to expose enough of the yellow or brown ring so that you can work directly on it.
If necessary, you can remove some of the water manually using a disposable cup or another appropriate method.
The more accessible the stain is, the easier it will be to work on it carefully.
Step 2: Wet the Pumice Stone
This is one of the most important parts of the process.
Before touching the stain, thoroughly wet the pumice stone.
The porcelain should also remain wet while you’re working.
Never use the pumice stone dry.
A dry abrasive stone can increase the chance of scratching or damaging the surface. Keeping both the stone and the porcelain wet helps the stone glide across the surface while you work on the mineral buildup.
If the stone begins drying out during cleaning, stop and add more water.
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