6. What to do for stubborn buildup
If a glass has years of mineral film on it, one soak may not be enough. In that case, I repeat the treatment a second time or use undiluted white vinegar on a cloth. Wrap the cloth around the cloudy area and let it sit for 10 minutes before wiping and rinsing.
Another option is to sprinkle a very small amount of baking soda onto a damp cloth after the vinegar soak and buff gently. I mean gently. Baking soda is mild, but
