hello - am getting into the swing with reusable nappies with my month-old 10-pounder - but am a bit worried about her damp back at night. we're using bambinex teddies (cos they dry so fast) and a tots bots flexiwrap. there's no leakage at front or round legs but her back above the nappy always feels really damp after 3/4 hours. is this because she's on her back so it oozes out? or is the wrap not tight enough. or ... ? any thoughts very welcome, thanks!