Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does nothing but cause problems

Those reviewers who say this product does nothing to increase humidity, totally correct listen to them. Those who say it creates some sort of white dust, they are not lying. I'm not even sure how this thing penetrates but i had a DVD in my dvd player and a game in my xbox, and both were not working, I took them out and they were covered in this weird substance. Then a few days later my cable modem broke. This thing wasn't even all that close to my electronics and it ruined them. Do not buy this piece of junk unless you just want to look at it, as it's kind of cute.