How To Hack A Keurig And Make Your K-Cup Coffee Not Suck. If you're using a Keurig coffee maker, it's because you have no other choice. Because the hot water in a Keurig spends way less.
It is a bad idea. Hot water, straight from the faucet, containsmore dissolved minerals (calcium, assorted salts, etc) than coldwater does. It's simply because of the temperature.more solidscan be dissolved in hot water than in cold.The same minerals that cause the scaling and 'hard water'deposits in your bathtub will also clog up your Mr.
Thereare coffee machine cleaners (chemicals) that help remove thesedeposits, but eventually they'll build up so badly that the machineis ruined. Using hot water, rather than cold, will ultimatelyshorten the life of your coffee maker.