Steve, the double washes with heat added boosted the performance of the Hotpoint. It's Bakelite impeller, like all of the Bakelite impellers eroded over time and became less effective.While the KitchenAids had a forceful wash system, the single wash was meant for thoroughly pre-rinsed dishes being loaded into the machine. Hobart used to cite their experience in institutional kitchens in their ads, but institutional kitchens are different from domestic kitchens with hotter water, steam, electric or gas water boosters and fresh soil rinsed off dishes. Even the UM 4 at lunch counters was run fairly continuously during serving hours so the machine relied on stored heat and fresh soil to perform well. The home machine usually started from cold each time and often relied on the dishes being rinsed under the faucet beforehand. My top loading portable has a 5 minute wash and two one minute rinses. When I use it, I stop it after the first wash drains and restart it with a fresh charge of detergent. The second wash is then good and hot.