Title: It's OK but didn't work at first
Product review: When first plugging the unit in inside the house I had a problem with resetting it and getting the level to read zero (with several attempts). I thought I might have a carbon monoxide in the house at first but took the unit outside and plugged it in in the garage and it reset to zero with no problem. After moving it back inside the house I plugged it in and now it works just fine. I still don't know why it [messed] up at first or mabey if I didn't do something right, but it was very frustrating. The good news is that it appears to work great now.
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