Dishwasher detergent

[1] All detergents are designed for use after the user scrapes leftover food from the dishes before washing.

[2] Most dishwasher detergents are incompatible for use with silver, brass, cast iron, bronze, aluminum, pewter, and goldleaf.

[2] They can also harm disposable plastic, anything wood, knives with hollow handles, and fine glassware.They can lead to these materials to be bleached or oxidized.

Hand-washing dish detergent (washing up liquid) creates a large foam of bubbles which will leak from the dishwasher.

[citation needed] Rinse aid prevents "spotting" on glassware (caused by droplets of water drying and leaving behind dissolved limescale minerals), and improves drying performance as there is less water remaining to be dried, and a thinner sheet of water has a much larger surface area than a droplet of the same volume.