1. Do you leave your LO door open when you use one ? We always shut LO door when he sleeps . I put it on the lowest setting and shut the door .

2. What do you put yours on. Our manual says not to put it on carpet, wood or a towel ? I have his on a table right now (wood) but am wondering what the heck kind of surface they expect you to use ? Glass? Cookie sheet on the floor (ha!)