Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very happy

First about air drying. The only thing about air drying I don't like is that in a bathroom there are lots of germs stirred up by family members sneezing and coughing at certain times of the year. And even flushing the toilet sends a certain amount of bacteria into the air according to the experts on TV.So I kept my brush hidden in the drawer the last 5 years, that was a big mistake, it only takes about 2 weeks to colonized with bacteria. I was getting these gingivitis like gum infections. For a few years I thought the bacteria was coming from my stomach, but after doing some research, I bought one of these and my gum problem went away. I will always have some type of sterilizer, they are too cheap not to when you consider the brush goes into your mouth.