Hi
I have used Diprotex on Ally and it is great, you can get it at Watsons and most dispensaries. Also have you tried just leaving the diaper off for a while each day for a bit of airing, I know it is tricky but should also help. I normally just put a shower curtain underneath a blanket or sheet so you don't have to worry about any accidents. Good luck i hope your little one gets some relief soon.