Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible heating element...tons of residue

I used the kettle about 3-4 days a week for about 4 months. I will say it heats quickly and was reliable. It is a little noisier than a Braun I also have, but no big deal. I ended up throwing it away yesterday because I finally couldn't stand the residue (heating element is NOT concealed). The stainless portion of the element (or whatever it's coated with) began to flake off and a ton of buildup would deposit on the rest of the element. It was probably producing about 1/8 tsp of flakes daily which was just way too much. I have a Braun at home (this unit was for work) and it's wonderful (no residue...concealed element).