Final answer:
Dishwashers require a special detergent that is used after scraping food off the dishes. Dishwashing detergents are foamy substances used primarily for hand-washing dishes but have other informal uses too.
Step-by-step explanation:
When using a dishwasher, it is essential to choose a special detergent specifically formulated for dishwashing machines. These detergents are designed to be used after the user has scraped leftover food from the dishes. To ensure effective cleaning, dishes must be placed inside the dishwasher in a way that allows water to flow over every surface.
Dishwashing detergents, also known as dish soap or dish liquid, are designed to help with washing dishes. They usually produce a lot of foam and have low skin irritation properties. Primarily, dishwashing liquid is intended for hand-washing dishes in a sink, but it also has other uses, such as making bubbles or cleaning oil-affected birds.