I left my teapot on the stove for about 30 minutes by accident. By the time I noticed, all the water had boiled out. So, I turned off the stove and let it cool.
When I went to put water in it again, black flakes began to come off the bottom of the pot on the inside, but I could not scrub out all the flakey stuff easily.
I have a stainless steel teapot. Are these flakes hazardous? How do I clean my pot to make sure it's safe to drink from again?