How to remove water marks
Water marks, such as the circular mark in the image above, are tricky and the solutions don’t always work. Personally, I use the white cream cleanser (CIF or JIF brands or equivalents). Pour on, rub in, then pour-on again and leave to dry to a powder, perhaps overnight – wipe off!
Tile Cleaning Tips – other issues
The use of turpentine =, or solvents is usually applicable when oil based paint stains and dyes have penetrated the surface of the porcelain tile, or stains that are miscible with the sealer. Most chemical sealers are good at repelling fats but will mix with solvents such as mineral turpentine. If you clean with turps, then you are also removing some of the sealer and may have to reapply sealer to the area that was affected. If nothing else works then soak and clean multiple times with mineral turpentine (clear – not tinted of course). By using turps the stain should also be removed. Note that mineral turpentine produces harmful vapours, is flammable, is also classified as a poison so you must take the precautionary measures as indicated on the bottle of turps. A similar consideration applies to acetone (aka nail polish remover)
Solvents can also be applied when the problem stain in the application of the wrong sealer, either at the factory or by the installation team, or even yourself.
– If you do use a solvent based cleaner you will need to re-apply the porcelain sealer afterwards. Note – some tile shops sell a stain displacer also known as a presealer. You might want to ask around before applying any solvents. An easier solution may be found.