I used to use these in every floor of the house, they are expensive so when i saw coupons i would stock up.one day i forgot about one and it was on empty so i un plugged it and noticed it was super hot, i got scared and decided to do some resarch and found a lot of them catching fire...so i unplugged them all and decided to get some scentsy products which are safer and last a long time and cheaper.

Thanks but no thanks

seriously, it wasn't noticable for me. i dont even smell it. it's been plugged in for weeks now and i just realized that it was plugged just right now cause my hubby said so. he said "oh, it was there for almost 3 weeks" and i was like "really? wasn't effective. didn't even smell a thing."