So Simple Ideas
Try using a soft cloth or sponge that has been dipped in warm water and dish detergent. Gently rub the stain until it is gone.
Create a paste made of baking soda and water. Apply the paste to the stain and leave it on for 15 minutes before you scrub the stain away with a brush or sponge.
For stubborn stains, try a mixture of baking soda and hydrogen peroxide in a paste. Let the paste sit on the stains for a whole day or overnight before rinsing off.
You can also use vinegar as a cleaning agent for Corian because it can remove stains from the surface.
To remove grease, fat, and oil stains from your sink, fill a spray bottle with 3/4 bleach and 1/4 water and apply the mixture to the stain. Protect the faucet and fixtures by wrapping them with tape.