The best way to get rid of a baby's diaper rush is by cleaning the affected area thoroughly and applying diaper rash cream. Changing the diapers often - every hour, if possible will also help to get rid of baby's diaper rush. For more information you can visit the www.ehow.com/how_449_treat-diaper-rash.html website.
It also helps to let it air out for a while. I know that an accident might happen but when the rash is covered and moist all the time it takes longer to clear up. Just put down a couple of towels and let them roll around for a while.