You can clean wax from Corian countertops by scraping the wax off. For wax that is stuck, you can wet the wax and then scrap it off. Afterwards, you can clean the surface with warm soapy water and ammonia based detergents.
Put a glass of water in the microwave for 3min. then pour it in the area of the wax scrub it with an old tooth brush repeat as you need once remove clean with warm soap water and use same brush good luck.