Product review (5 stars): Works great
These filters work great, and I've seen some people complain that they don't last very long, but water is so naturally corrosive, how long do you imagine these to last? Six months? No, and we don't want our kid breathing the humidity that this thing would put out after that long. We clean them out after about four weeks, flip them over, and use them another couple weeks. Then we buy more. You'll notice how the water usage goes down and that's how you'll know to replace it or clean it and buy another one. We love these filters, and have no problems with them at all. Enjoy!