I found the Moogoo worked really well. Got the soothing MSM cream (uddercream). Is the rash dry or moist? What worked well for DD2 was plenty of nappy free time. I would but the moogoo on, let her have same free time, then put cornflour on. Both are fine for MCN. Cleared up the rash really quick. If the rash is a dry one, then I skip the cornflour. I also use soft wipes with camomile tea to help sooth her bottom.

Hope it clears up for you quickly!