I just tried to use my airsense 10 after I put more water in it and put the pillows on my nose and turned it on and it about blew my face off. I turned it off and in trying to get it to work and no luck. So I picked it up to see if I could figure out what was wrong with it. When I picked it up, I realized that the water tank was not pushed all the way in. When I pushed it in and turned it on, it works fine again.