If regular diaper rash cream isn't clearing up the diaper rash in time then you might try giving your toddler an oatmeal bath for the diaper rash.
Soaking your toddler in some oatmeal will help with the healing process of the diaper rash.
If the diaper rash still doesn't go away within a few weeks then you need to take your toddler to his/her pediatrician because they might have to prescribe a stronger diaper rash ointment to clear the diaper rash up.