Hestan NanoBond's molecular titanium cooking surface is extra durable and exceptionally easy to clean. To maintain your NanoBond's original brilliance, we recommend occasionally using a soft cleanser like Hestan Professional Grade Cleaner. It easily removes any temporary bluing/discoloration that can result from a combination of high heat, trace minerals and oil residue. Hestan Cleaner is nontoxic, biodegradable and specially-formulated to restore your NanoBond's titanium luster to a sparkling finish, dish after dish.