[header] How to maintain a corian countertop [title] Use dish soap and water to wipe down the countertop. [step] For everyday dirt, grime, and food residue, wet a sponge or soft cloth. Squeeze out a small circle of dish soap onto the sponge, and rub the soap into the sponge to get a soapy lather. 
Wipe down your entire countertop with the sponge. Rinse the soap off the counters with a damp sponge.