I've been fighting my 8-year-old son for 3 years to stay dry. I bought a Dri Sleeper back then, and it worked - on and off. He's been bedwetting regulary again, and I decided to start using it again. However I discovered that the Dri Sleeper was no longer working, so I ordered a new one. The new sensor is very different from what they used to have, and is so sensitive, it beeps 10 minutes after putting it in his underwear, with just a little body heat/sweat. I plan to return it.