Stainless Steel Pan — gray bottom. Why

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Just started using a stainless steel pan. First thing I cooked in it was bacon followed by some fried rice. Stuff stuck to it, but a quick soak and it all came off. However, once I cleaned and dried it there is a kind of gray discoloration on the bottom of the pan. It essentially disappears if it gets wet, but when I dry it, it comes back. First — is this normal? If not, is there a way to fix it?

First, this is what it looks like dry:

dry pan

Second, this is what it looks like wet:

wet pan

It's an All-Clad 4 quart stainless steel saute pan.

Best Answer

This happens to mine, and they are most definitely stainless, not aluminum. Our stainless sink gets the same way. I assume it's from all the minerals in our water. I have found that mixing up some Oxyclean and water and a couple of minutes' soak and a scrub with a plastic scrubber will get rid of it (both from the pan and from the sink). It comes right back, though.

I haven't found that it has any negative impact on the usability of the pans, and doesn't shorten the life significantly if the 14+ year old chef's pan I use almost daily is any indication.

I did a little more research, and it's definitely mineral haze. Recommended treatments are Barkeeper's Friend (mild oxalic acid) soak/scrub, or boiling some vinegar, either one followed by a thorough rinse. In theory, if the haze is left alone it could develop into buildup, which would begin to degrade performance, but in practice it's not an urgent worry.

So if it bugs you, clean it off with mild acid or oxygen bleach. But expect it to come right back. If you only removed it once a year, you'd be a couple of years ahead of my cleaning schedule, and I haven't seen any harm from it.