The dishwashing chemical usually contains a blend of detergents whose purpose it is to emulsify oily and greasy soils and prevent opportunities for their redeposition or spreading back onto the surface. In fact many dishwashing detergents blends used in dishwashing products may actually help sheet of the wash solution and facilitate rinsing and drying. And there is always a backup - the rinse agent whose purpose is to allow water to sheet of the dishes rather than dry in droplets. Being a detergent itself, the rinse agent should also assist in dislodging any loosely attached microscopic and invisible fine films, composed of oily substances which may not have come of completely during the wash cycle.

If you are curious as to how clean your glasses really are, try the 30 second audit and find out for yourself. Pour 6 to 8 ounces of beer (any brand will do) into a clean, dry glass (carbonated colas work equally well) and examine the appearance at the sides of the glass. The tiny carbonation bubbles should disappear within 30 seconds. If they persist and seem to adhere longer to the interior surfaces, then it indicates that the glass is not spotlessly clean, and may actually harbor a very fine and invisible film on the interior.

If the bubbles disappear from the sides and float to the surface rapidly, then the glass is clean; lift and hold it close to your lips and say CHEERS!