Fill the Dutch oven with water. Pour out the water and leave the inside of the cookware wet.
Wet a scrubbing sponge and squeeze to remove excess water. Sprinkle a liberal amount of a gentle powdered cleanser onto the surface of the sponge.
Scrub the burned areas of the enamel with the powdered sponge to remove the stains. Rinse the sponge as you remove the burned food.
Rinse the inside of the Dutch oven with warm water to remove the cleanser. Examine the cookware.
Place the Dutch oven in the sink and fill it with warm water.
Drop one effervescent tablet into the water. If the Dutch oven is large, use two tablets. The tablets will begin fizzing.
Allow the tablets to fizz. Pour the water down the drain once the tablets stop fizzing. The surface stains should be gone.