If you find that the one detergent wash and one after rinse prove inadequate, you can do like I did with mine and wait with a 3 quart pitcher of very hot water and pour it in after the machine finished filling for he post wash purge. That brings the amount of water in the sump to one gallon and it is enough to spray water to the top of the machine. The drain after the purge is sufficiently long to completely empty the water from the machine then it goes into the only final rinse with less of a detergent load and you get dishes that dry without the fine detergent film on them. This procedure also reduces the lingering alkalinity that dries on the vinyl racks and causes them to degrade so much more quickly than the racks in previous series that gave at least two after rinses.