Use Ajax or Comet and scrub it with a scouring pad, but not too harsh.

bleach,and a scrubbing pad.

there are a few great methods that don’t require clorox and that are very safe for food surfaces:

First, dampen the surface. Sprinkle with baking soda and let it sit for a half an hour or so. Scrub gently.

If you need more brightening power, cut a lemon in half and scrub the baking soda with the juicy side of the lemon (both scrubs and bleaches).

For really tough stains, use Borax (the 20 mule old fashioned stuff). Spritz with water, then sprinkle the borax and let sit for a couple of hours…then scrub clean.

If you use baking soda, it works great for cleaning the stainless sinks and chrome hardware. Just be sure to spritz the surface down with white vinegar when you are done to remove the very fine powdery residue. BE CAREFUL, though — DON’T use either for cleaning granite or quartz countertops…both may pit the surface.

mezcle un poco de bicarbonato de soda en una goma y frótelo adentro al área de los affectes. sus trabajos sobre la mayoría de las manchas.

If you have a rust stain, you need a product that contains oxalic acid. In the US you can buy Whink, which is sold near the stain removers in the laundry section of the grocery store. Whink comes in a brown plastic bottle. It works really fast — you have to stand there ready to rinse it off, because if you let it stand it will etch and roughen your porcelain. It works great, but don’t let it sit on your skin.