Yesterday I ran out of dish soap. I mixed up some laundry soap (a bit weaker than normal) and did my dishes with it. They turned out free of coffee and blueberry stains. That's good because there were no coffee or blueberry stains on them. They didn't turn up whiter than white, but that's ok as they werem't white to begin with. The main thing is they turned out clean enough to eat off. I'll admit I'm no yuppie suburbanite with fifty five different bottles of soap in the cupboards, waiting for the next Fad Of The Week to show up, but I have very clean dishes. I think the idea is not what you use for soap, but to always rinse it (and the dirt) off.