Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Weak vacuum that does not pick up lint/dirt

I bought this vacuum because of the reviews on Amazon. I wanted to use it to clean up the kitchen (wood floors) once in a while and use it on our carpeted stairs. In the first week it was great. However its only been 3 weeks and the power is very weak. You have to vacuum an area several times just to pick up loose items. Its faster for me to bend over and pick it up myself. My dust buster does a much better job. Also on the "bare floor" setting, it picks up *nothing* on my wood floors. I have to set it to the carpet setting for it do anything at all.