I have a problem. It wants to stay on numbers of previous night. I put on the mask a few hours before I go to sleep so I can try to adjust it. I start up the mask and let it run while strapped to face. I then wait thirty seconds turn it on hold and keep on hitting button to stop and start it. It might go right away but it also may take 10 times of on and off before it drops to zero. I then let the mask wait until I am ready to go to sleep. I also have a tube for extra oxygen attached which I turn on before going to sleep. My mask is special - extra wide small with more rubber lining mask. I cannot use The SoClean. Jane Brown