I adapted in this way: at night I put it close to the bed, see 50-70. I turn on one (night mode) and sleep. In the morning everything is fine, nothing is overdried. The window is open, not stuffy. I turn it off in the morning. It works for me only at night and in winter, when the batteries dry out the air. I haven't found a better one yet. I've been using it for over three years. Works great.