I Can't Get Diaper Rash To Clear Up. I Have

I can't get diaper rash to clear up. I have used Aquaphor, Triple Paste. I have let him air dry after bath before putting on ointments. The skin is broken. I do not use wipes due to burning his skin in this sensitive area.
He is currently drinking Organic Almond Milk due to his Bm's. Tried different milks but they seem to irritate his skin also.

What else can be done? Aveeno Oatmeal bath? Is there a home remedy I can try?