For gentle surface cleaning you can make a paste with one part peroxide and two parts baking soda.
How to clean dirty stained ceramic.
Use a slightly damp not soaking wet scrubber to gently rub away the dirt.
Easy way for mildly stained pieces.
What to do.
Use a 3 hydrogen peroxide to remove stains from ceramic and porcelain.
Plan to clean your ceramic sink monthly to avoid stains and other dirty buildup.
You can do this using a mild abrasive like baking soda or a more potent chemical like bleach.
Soak your stained item in the solution for several hours or until you see the stains disappear.
Baking soda has been used for years in lot s of cleaning and removing of tough stains.
You will need two tablespoons of baking soda to clean one super dirty ceramic cookware baking soda is abrasive enough to remove food stains from ceramic cookware without causing any damages to the surface of the pan or pot and here is how it could be used.
Apply the paste and let it sit for about 30 minutes before scrubbing and rinsing.
Use a non scratch scrubbing sponge.
The baking soda should form small clumps that take the dirt with them as they come up.
Avoid steel wool or pumice stones for this purpose as both can do a lot of damage to ceramic or porcelain sinks.
Buy regular oxygen bleach typically used for laundry e g oxy mix the powder in hot water and wait for it to cool off or use the liquid version of oxygen bleach.
Baking soda can clean all the stain from old ceramic sink without damaging and any scratches.
You can also pour peroxide directly on stubborn stains.