Kid--keep your clothes on!

Ok, I don't know how to stop this but it is happening more and more. We go check on chaz every night before we go to bed. well here recently he had started taking off his diaper. we have only had 2 times that there was pee, no poo (thank the lord!) We don't want to discourage him from taking off his diaper as we are trying to potty train but he needs to keep it on at night. UGH!