Latte cups, like other coffee cups, tend to gather stains over time. Coffee stains are notoriously hard to scrub out, unless you are using an abrasive scrubber. However, if you want a cheaper, chemical-free method of removing stains, you can restore stained latte cups with a quick scrub using baking soda.
Baking soda is the perfect alternative to commercial dishwashing solutions. It does not leave any residue or a strong chemical smell and its abrasive property is mild enough to remove stains without damaging the surface of the cup. You can create a baking soda paste by mixing a tablespoon of baking soda with water, which you can use for a tray of latte cups. With about 30 seconds for each cup, this is definitely a very cost-effective and efficient method for removing coffee cup stains. If you want to add a fresh, clean scent to your stain-free latte cups, add a few drops of lemon to the paste.