If you're as obsessed with coffee as we are, chances are you have at least one mug in your cupboard stained with those irritating brown marks.

Banish stains and dullness to get your sink basin sparkling again with these four gentle yet effective methods for how to clean a porcelain sink.

Clean spills immediately, especially coffee, wine, and tomato sauce, which can stain if left too long. "Basically, avoid leaving anything super acidic in your porcelain sink," advises Knoll.

Q. What is the best way to remove a coffee stain from my kitchen sink? A. The good news is that coffee isn’t the toughest stain you and your kitchen sink could face. As long as you use the ...

Baking soda provides that little bit of abrasiveness needed to efficiently cut through those stains. To get stains out of a porcelain sink: Pour some baking soda into the bowl and add a little water.

Citric acid easily removes rust stains from porcelain sinks, tubs, and toilets.

It's an accurate term for sinks made of cast iron or fireclay topped by a porcelain-enamel glaze, as well as for sinks molded from a variety of composite materials.

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Best for: Ceramic or porcelain Use a solution of one part 3% hydrogen peroxide mixed with two parts cream of tartar to remove rust stains on ceramic or porcelain sinks, tubs, and other fixtures.

Clean spills immediately, especially coffee, wine, and tomato sauce, which can stain if left too long. "Basically, avoid leaving anything super acidic in your porcelain sink," advises Knoll. "Use a ...