Metal abrasions are often identified as cracks. On toilets without wondergliss you can remove it with abrasive.

Allow the cleaning agent to soak in. Simply wet the affected areas with cleaning liquid (soaking a cloth with liquid where appropriate) and leave for a few hours. The dirt is then often very easy to remove.
Foam-type cleaners have the advantage that they adhere to smooth and vertical surfaces longer than liquid cleaners. Foam can also be sprayed directly under the WC rim. This reliably removes scale, bacteria and germs.

Yes, furniture items are suitable for the bathroom and will not be affected by normal levels of moisture. Stagnant water on wood (melamine) countertops should be wiped off.
After taking a shower or a bath we recommend briefly wiping the furniture down with a dry cloth and airing the room thoroughly - by means of an extractor fan when there are no windows.

To ensure lasting satisfaction with your Duravit WC-seat fitting/cover for urinal, you should observe the folowing points carefully:
1) Clean the fitting, including the hinges, regularly with warm water and a mild detergent. Afterward rub dry.
2) Do not use any caustic or scouring agents
3) Protect the fitting with a thin coating of colourless furniture polishing
4) The fitting and hinges must not come into contact with WC cleansing agents. When using WC-cleansing agents, please lift up the lid and the seat/cover for urinal and do not put them down again until the cleansing agent has been completely rinsed from the bowl/urinal, since the vapours from the cleanser may attack hte surface of the fitting.

In every water, lime exists naturally. This lime can landfill on the ceramic due to evaporation. Only little at first, but with dirt and minerals of the water, you will see the landfills by and by.
The foulings of days or months, you can't remove with one wisp. We recommend to put a cloth with cleanser on the area concerned for a few nights. The confirmed lime will be soften and you can abrade it with a toilet brush. The products without WonderGliss, could also be abraded of lime by an abrasive cleanser or razor blade.
You can also abrade foulings in the siphon, if you act the cleanser for a longer time. Before that, you have to blurt the water out of the siphon with the toilet brush.
More questions? Please send your request to service@duravit.de