Are you talking about dishes? Or other glass? I use citric acid in my dishwasher to deal with hard water stains on glass dishes.
if the glass is etched, it won't come off --if on windows from lawn sprinklers, try CLR - Calcium/Lime/Rust remover ...
Toothpaste might help
Vinegar. If you can soak the surface longer contact will work better.
CLR and some scrubbing, to avoid a repeat performance put a squeegee in your shower and squeegee the water right after a shower.
Works the same on windows. also, you can apply a layer of rain-x to repel water.
Try white vinegar
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Are you talking about dishes? Or other glass? I use citric acid in my dishwasher to deal with hard water stains on glass dishes.
if the glass is etched, it won't come off --if on windows from lawn sprinklers, try CLR - Calcium/Lime/Rust remover ...
Toothpaste might help
Vinegar. If you can soak the surface longer contact will work better.
CLR and some scrubbing, to avoid a repeat performance put a squeegee in your shower and squeegee the water right after a shower.
Works the same on windows. also, you can apply a layer of rain-x to repel water.
Try white vinegar