i make my own soothing and calming solution with calandular flower and camomile tea... i mmake a batch, add some cold water and use that on cloth wipes...
Use this as a wipe after nappy changes and also bath in water withh a batch added each day...

We have only once had nappy rash and that was when we were away camping and we used shop bought wipes and she had no nappy free time and not very many baths (it was freezing)
As soon as we were home, i switched back and also bathed her in this tea mixture too and it was gone really quickly

i hope this helps