Woman washing a cup with hard water stains
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Remove Hard Water Stains From Your Cups With This Laundry Staple
Hard water stains may be a persistent kitchen nuisance, but a versatile laundry staple — fabric softener — can remove them from your cups effectively and easily.
To do this, pour a few drops of fabric softener onto a sponge or add a drop of dish soap to a fabric softener sheet, then scrub your glassware as you
normally would.
If the stains are stubborn, coat the cups with the softener and let them sit for 10 minutes, giving the product time to penetrate and dissolve the stains.
Remember to promptly wash the cups with dish soap after the treatment since fabric softener isn't food-safe. Also, wipe the cups dry with a cloth to prevent stains
from reappearing.