Just started to use Swaddlebees AIOs on DS - they're great, no leakages, nice fit. Only problem - been using for 2 days and DS is getting quite bad nappy rash, so I've put him back in disposables for now so I can put Sudacrem on him. Am I doing something wrong? I am using them like disposables, but should I be changing after every wee to keep him dry? Any advice very welcome .