Negative Positive
Title: works great
Review: i smoke in my home, after i opend one of this by my work desk, all my friends noticed a difference in smell. they do have a slight smell, but i only noticed from the one i placed in my car, the one in my house, you have to lift to your nose to smell. with that being said, they do run out fast but they work so well who can complain. i want to say on average about 2 to 3 weeks of use for a smoker.
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