Hard water stains are a common problem in areas with tap water that has a high concentrations of minerals, and particularly for homes without water softeners. Hard water stains can especially be a problem in bathrooms (shower doors and walls) and on windows that get hit by sprinklers.
I’ve seen a lot of different home remedies for cleaning hard water stains from windows, such as:
- Wet newspaper
- Lemon juice
- White paste toothpaste (non-whitening)
- Baking powder
- Powder stovetop cleaner
- Wet fabric softener sheets
A lot of them make sense for different reasons, but some I don’t get. Wet newspaper? Vinegar? Maybe if the water spots are minor or from poor previous cleaning. Wet fabric softener sheets? I would think those would leave an awful, streaky mess, since that’s what towels washed with fabric softener do.