Like Keita, many users swear by this stuff for removing stubborn coffee and tea stains from the interior of their travel tumblers and ceramic mugs, cleaning coffee makers, and making those terrible scorched and oil-stained pan bottoms look like new again. Following the brand’s intended soaking method, you just mix a teaspoon or less of powder with boiling hot water and submerge the stained glass or metal item (or in the case of espresso machines, just run a back-flushing cycle). Let it soak for 30 minutes, then rinse clean. You can add Cafiza to your cleaning product lineup for just $17 or read on to see the other uses that reviewers have found for this unassuming yet super effective powder Promising Amazon reviews: ″So I was looking for something to clean my Ember mug. I didn’t know it at first, but apparently these cool mugs can get coffee stains pretty easily. I’ve scrubbed over and over and could not remove the stains. So I tried this powder and about 20 minutes later, the mug looked brand new!…