How do dishwashing liquids differ from other cleaning products? Why should I use a dish liquid specifically on my dishes?

There is a wide choice of products formulated to clean effectively. In theory, any detergent or soap can be used for hand dishwashing, except an automatic dishwasher detergent. However, soap has become almost extinct as a dishwashing product and many all-purpose cleaners or laundry detergents do not produce optimum results. These may leave spots and streaks, may not completely dissolve, or may discolor certain metals with soaking. A well-formulated, all-purpose detergent may be used for dishes in some economy-minded homes, but a light duty liquid hand dishwashing liquid like Palmolive® is the best choice. ... more