The Kirkland Signature (Costco) Dishwasher Pacs is part of the Dishwasher detergent
test program at Consumer Reports. In our lab tests, Dishwasher detergent
models like the Dishwasher Pacs are rated on multiple criteria, such as those listed below.
Cleans dishes: Gauges how well a detergent removed a caked-on puree of foods from glass dishes.
Cleans pots: Indicates how well a detergent cleaned pots that were covered with baked-on macaroni and cheese.
Resists water spots: Shows the ability to prevent water spots on glass plates.
Contains bleachBased on the package ingredients list and other package claims, some detergents include bleach in their formulas. While the presence of bleach has not seemed to act on the baked-on soils in our tests, it might help with tea or similar stains.
Contains enzymesBased on the package ingredients list and other package claims, most tested detergents have enzymes, which can break up food for easier removal.