I have a bathtub with this issue that I have scrubbed with everything imaginable, mine just won't get clean. I plan on painting over the whole thing in the spring with tub and tile paint:
Every time I clean my mirrors, they end up having tons of streaks and almost look worse than before I started. What could I use to clean them that won't leave streaks...
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LIME AND GRIME CLEANER...........
make a paste of baking soda and white vinegar
I have a bathtub with this issue that I have scrubbed with everything imaginable, mine just won't get clean. I plan on painting over the whole thing in the spring with tub and tile paint:
https://www.amazon.com/32OZ-WHT-Tub-Tile-Kit/dp/B00KXWY1PA/ref=sr_1_1_sspa?ie=UTF8&qid=1518530731&sr=8-1-spons&keywords=rustoleum+tub+and+tile+refinishing+kit&psc=1
I would try Lime Away. My former house had hard water and I had to use it to keep a hard water lines from forming in my toilets.
YouTube has some ideas: https://www.youtube.com/results?search_query=remove+hard+water+stains+from+bathtub
Try CLR cleaner.