I sometimes put a baby washcloth under their necks (where they tend to get the rash) a couple of tines a day to make sure it stayed dry. I also put some vaseline on once a day, after taking the cloth off so it was already really clean and dry. It cleared up in a couple of days.
Autocorrect has helped me type this.
I lift my eyes unto the hills, Where does my help come from? My help comes from the Lord, The Maker of Heaven and Earth. And I'll praise You in this storm and I will lift my hands, For You are who You are no matter where I am, And every tear I've cried You hold in Your hand, You never left my side and though my heart is torn, I will praise You in this storm