i had to stop using mine at 2 months because DD would wiggle all the way down it. i figured it wasnt doing any good if she wasnt staying on it so why use it in the first place. i did put a rolled up towel under one side of the matteress though because she needs the incline so she isnt congested.
I'm glad I saw this post, my LO has been wiggling down her's too. I thought maybe the one I got was a cheap one or she was just an escape artist. I woke up one night and she wiggles down so much her face was in one of the side wedges I damn near had a heartattack
Re: How long do you use a sleep positioner?