snell, this happens sometimes because of sleeping on back of head will put stress on the piece and loosen. If you can deal with changing piece every 4 days a sure win is putting blue liner tape on piece on sides and back...when you take off piece, start in front and remove the tape and piece together from your head then spray (i use an old spray conditioner bottle filled with 91% rubbing alcohol) alcohol through the hair onto the tape- let sit 30 sec and it comes right off and if carefull you lose little hair with propper alhohol release. it will hold better for a sleeping tossing turning bedhead than any glue