I only use One Tablespoon of Tide per load; I do a prerinse and an extra rinse; I STILL get buildup. The dipes are in there now rinsing away. Maybe it's the hard water? I don't know. The Calgon always seems to make suds magically appear. I don't think I can use much less than 1 tbsp and still have clean dipes....but I hate using so much water!!!!