Almost 10 month old DD is in size 5 Pampers Baby Dry nappies. All good (she definitely needs this size nappy to fit around her middle and her chunky thighs) - unless she sleeps on her back either during day time naps in the cot or during the night. She wakes up soaked, like the nappy has leaked up the top at the back of it, as the nappy otherwise wouldn't be anywhere near sopping wet - cue full change of clothes/night clothes and bed linen. But shes fine if she sleeps on her belly. I've tried her in pyjamas with vest/with no vest/babygro with & without a vest on, and of course her normal clothes for daytime naps but nothing is fixing the problem. Any suggestions please? Obviously uncomfortable for her (she's very restless when she's wet) and its a laundry nightmare too... Thanks.