Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless junk

I have had TWO of these things and they were both worthless! The first one just quit after a few months (the little side brush had stopped working almost immediately. The second one had a battery meltdown in about 7 months. The little side brush also quit working almost immediately. Both of them made horrible noises and were dirty and messy to clean up. I did not overuse these things; they are just junk! Ugg!