the idea was given to me by my dishwasher,dan, while i was chef at the conference center. the idea was originally for griddles and yes the lemon juice works better than chemicals. just be sure to buy the cheapest that you can get. it saves a bunch of bucks and you never have to worry about chemical containmenation of your food.
ps. i have no idea why the cheapest concentrate works the best. sure glad it does though as it improves the bottom line [:D]
pps. always treat your dishwashers like gold!!!!!!!