If you’re cleaning and still seeing cloudy spots on your glassware, you probably have hard water. What you’re seeing is some film residue caused by the hard-water minerals that has remained after the water has evaporated. And it isn’t just an aesthetic concern. That residue can build up in other places water is used and clog up drains.

Remove Hard Water Stains
As with most stains, the longer it sits, the more difficult it is to remove. There are cleaning products that can help remove the mineral buildup from surfaces or run dishes through the dishwasher again, this time using a rinsing agent. It can also help to increase the amount of detergent used a bit. On surfaces, look for a cleaning product designed to tackle hard water stains and follow the directions on the label.

Prevent Hard Water Stains
The main way to prevent hard water stains involves installing a water softener in your home. However, there are other things you can do that will help. Since hard water stains are caused by evaporated water, the key to preventing them is in keeping things dry. Dry glasses with a clean cloth instead of letting them air dry. Wipe down the shower after using. Clean regularly to prevent buildup.