Product review (3 stars): Don't last that long, but does the job
Each filter only last 2 weeks max for me until I have to change it and we use it mostly every night. It starts to spots of brown within a couple of days. I found they are better then the other kind, Pro Tech, which wouldn't even last a week. We have the Vicks Cool Mist Humdifer for our baby's room. So annoying because they are expensive.