How can I remove yellow stains from bathtub? Magic erasers help a bit

Try a vinegar soak for a few hours, fill up enough to cover bottom of tub and dump in a half gallon and let sit for a couple hours.

Try CLR works for me

The Works for Shower is the best to remove stains that you just can't scrub off. It is quite a caustic smell so beware of that. It's the only thing that removes the stains. I also use The Works for the toilet. Find it easily at the Dollar Tree for a dollar.

If it were me, I'd use a Turbo Scrubber. You can get them at Walmart now or order on line, and they take the hard out of hard cleaning! My husband got me one as my shoulders and neck bother me so much and I wish I had one years ago. They really clean. He likes it so much, he enjoys cleaning with it too! Good luck.

Easy Off Oven Cleaner in the BLUE can. Spray it on, let it foam and sit till it liquefies. Then rinse. My ex used the Works in the master bath toilet and it etched the glazing over time. Now this toilet gets stained quicker than the one in the guest bath that the Works wasn't used. Glad she didn't use it in the tub.