DD's was 12 or 13 days. It was pretty stinky as she was in cloth nappies and though we were tucking them down, it was still too humid. I mentioned to the Health Visitor when i was transferred to her on day 10 and she said to try a hairdryer on cold held away but directed underneath where the wet stinky area was. This worked really well, it fell off a few days later, after 3 goes with the hairdryer and lots of "belly-out" time with her vest rolled up and sleepsuit unpopped round that area...

Hana