Help! Need natural cleaning solution~~

[roseyaire]

Hi:
We live in the woods and have well water. Our shower is ceramic tile, and the grout gets all brown and crappy. I need a natural cleaner (probably one I make myself) that will clean the mineral deposits and crap from the shower and the grout without the use of bleach or other vile chemicals. Does anyone have anything they use? Even for a powdered cleanser, I need to use one like Zud or Barkeep's friend that has oxalic acid in it, b/c regular ones like Ajax or whatever won't touch the brown deposits left behind by the well water. Hippies, help me!!
TIA--

[yusuff]

sorry i dont know

[Zen O]

White vinegar is very acidic and that will help disolve the Lime/calcium deposits from your hard water. Lemon is acidic too, and MAY do the same thing. But I would think it more expensive by the time you got enough juice. I know vinegar is used alot