Urnex Single-use kit cleans and descales your machine. Capsule cleans brew chamber, exit spout and nozzle, removing coffee oil residue. Descaler removes mineral buildup better than vinegar, without the smell. Cleaning is the process of removing the coffee oils that will affect the taste that you want from your carefully selected coffee beans. Descaling is the process of removing the mineral build-up from the heating elements in the machine. Regular descaling will help extend the life of the machine and maintain consistent temperature. Vinegar is a relatively weak acid that will not clean away many coffee oils or descale efficiently. It is difficult to rinse, takes longer to be effective and leaves behind an unpleasant odor and aftertaste that can affect future brews. Coffee is by nature a very oily substance. Over time, coffee oils accumulate inside of your machine to form a rancid residue. This residue is responsible for the acrid smell you may recognize coming from a poorly maintained machine. Unfortunately, this residue causes more than just bad odor. If allowed to develop, residue inside of your machine will eventually clog the machine and cause it to malfunction. Well before your machine clogs or you even notice the signs of neglect, the stale residue lining the inside of your machine will begin to affect the taste of your coffee. Urnex was founded in 1936 to help the coffee roasters and brewers in New York City deliver delicious coffee to demanding customers. Almost immediately, the enemy of true coffee flavor became clear: oily buildup on equipment makes fresh coffee taste bitter. We are proud to use our 80+ years of expertise to provide coffee drinkers at home with the same level of cleaning excellence we offer our commercial customers.