My 8 week old dd has a rather large double chin (she also has cankles and lovely chunky thighs ?) but it gets really dirty under her chin and I struggle to clean it without letting her head flop right back which always frightens me as I worry it'll hurt her. I've tried pouring water down it when she's in the bath but it doesn't work and screams if I try and wipe it with a baby wipe. How do I get it clean? Sorry if I'm being dense and the answer is really obvious