I’ve tried baking soda and BKF. Bar keepers worked much better, I have hard water with rust and it’s one of the very few things that helped with the rust. Better than comet even.
@Hoggirl, a long time ago I went to a Norwex party and bought a few cloths. Probably the only home party where I thought the stuff was MUCH better than what I could buy anywhere else. I still use them almost every day 10 years later.
I would look on eBay to find norwex without having to go to a party.