We appreciate your feedback and recommendation, Kennedy. To avoid the stain during daily use, please 1) Always use on low to medium heat and avoid the open flame climb up to the wall of the pots/pans. 2) Do not use metal utensil or utensil with hard edges. 3) If it is a slight stain, boil white vinegar and water in a 1:2 ratio over low heat for 10 minutes, or apply baking soda paste to the stained area, let it stand and then wipe it to prevent the pigment from solidifying. 4) If the outer wall is stained with oil and carbon black, it can be soaked in warm water with neutral detergent and then wiped with a soft cloth. Do not use hard objects such as steel wool balls to scrape, as this may scratch the outer wall coating or the stainless-steel material, causing a more serious staining in the future.

We're sorry to hear about your experience, JULISSA. We would like to remind you to 1) handle the pots and pans carefully and avoid damaging them when storing. 2) Avoid harsh cleaners. 3) Do not use metal utensil and objects with sharp hard edge. 4) Never dry-cook over high heat. 5) Stack cookware with a soft cloth or paper towel between layers to avoid scratching the ceramic coating. All Member's Mark items come with a 100% Satisfaction Guarantee and can be exchanged or returned.

We are sorry to hear about your experience, Gdit. Here are some tips for you to maintain the superior nonstick performance and shining colors. Always cook in LOW TO MEDIUM HEAT. HAND WASHING RECOMMENDED though these are DISHWASHER SAFE. Always cool down to room temperature before hand washing. The use of high heat and a sudden temperature change (Thermal Shock) can cause metal fatigue, warping, deformation, non-stick deterioration, chipping, discoloration. However, a deep cleaning of the non-stick surface can help restore performance. This may include soaking overnight in hot, soapy water and then thoroughly washing the surface the next morning. When stacking your cookware, always place a piece of paper towel or cookware protector between pots and pans. This prevents scratches and other damage on inside and outside coating. Please remember all Member’s Mark items come with a 100% Satisfaction Guarantee and can be returned at any time.