My nephew went through a phase where, after almost every nap, he’d take his diaper off! Talk about unpleasant- especially if there was something in it. Making sure he was in a onesie, and it was completely buttoned before he went to sleep, worked for us, but some babies even manage to wiggle their way out of that! If your baby is a master of escape, check out this post by Jackie at Happy Hooligans for her Houdini-proof way to keep diapers on sleeping babies:
-You’ll need a pair of one piece, footless pyjama sleepers . You may already have a pair, but if you don’t, you can cut the feet off a footed pyjama sleeper.Now, put the sleeper jammies on your child BACKWARDS! Yep, that’s right! With the zipper at the BACK! Chances are your child will not be able to get out of the backward jammies no matter how hard she tries.