Has anyone else had this problem? my 18mth DD sometimes wakes at this time and is ready for day. Nothing I do will get her back to sleep. Have tried CC for hours on end, sometimes she will drop off again for 20 mins but that is it. Just when I am coming to the end of my tether she stops it again and has a week of being good (well always up at 6am but that is manageable). If it was permanent then maybe a sedative to break the cycle would work, but as it is sporadic I don't know what to do. At this age CC is just a battle of wills I think. Have managed it successfully in the past but she's just too determined now.