baking soda for diaper rash?

So lo has a diaper rash with blisters. I have been using destin extra streght, But is has not clear out as fast as I thought so I looked online and it read baking soda baths helps so I put 4 tbs to her little tub since it didn't specify how much. Can I apply a&d after a baking soda bath? And how much baking soda to use?

Moms Expertise
Thanks, I will try that is it better than ointments?
    Are you still using wipes? When my daughter got bad diaper rash, switching to soap and water instead of wipes helped us best.