I just bought a new wok - no idea what material it is, but it is not cast iron and not non stick. I washed it out before using it for the first time. What I used it for the one and only time I've used it was to steam dumplings - there was water in the bottom of the wok and a bamboo steamer on top.
I washed the wok when I was done, and now there is a very thin layer of whitish/chalky residue on the bottom of the wok at about the level of where the water was. When I scrape it with my fingernail it comes off, so I tried scrubbing the wok to get rid of it. When I dried the wok the residue came back.
Anyone know what's going on? I don't want to cook again with it until I know it's safe to use.
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