My tea kettle has a bunch of black dots all over the inside bottom part of it. I tried washing it and using a scrub sponge to scrub it off but it won't come off. Is it safe to continue using it or am I drinking stuff that's leaching from the kettle?
To better describe this, the black dots are small dots, like if you used a pen to "dot" a piece of paper. The dots are only on the inside of the kettle, the part that touches the water. It doesn't show up on the outside bottom of the kettle. The dots are all over the bottom, there's no one part where it clusters up.
I highly doubt it's mold. It could be rust but I'd think (but have been wrong many times) it would have scrubbed off with the scrub sponge. Thanks in advance for your help.
EDIT: Newly attached picture below