Hello J Brooks,
Thank you for your review and for sharing your feedback. We are very happy to know that you are satisfied with the performance of the D3 Stainless Sauce Pan. We also regret to hear that you are experiencing some difficulties cleaning your cookware. Some stains and food remains may take more care to remove. For discoloration, like blue or rainbow coloring like you have experienced, we recommend wiping the sauce pan with a sponge or soft cloth and white vinegar. Then, clean your pan in warm soapy water. If you are still experiencing issues removing the stain, we recommend using a nonabrasive, non-chlorine cleanser, like All-Clad cookware cleaner, Bar Keeper's Friend, or Bon Ami. When using these cleaners, form a paste with a small amount of water. Apply the paste using a soft cloth or sponge, rubbing in a circular motion. Then, rinse with warm water and dry immediately. These tactics should clean your sauce pan and make it look brand new. These stains will not affect the cookware's performance. If you are still experiencing some difficulties and would like further assistance, please contact our customer service team directly through our website at https://www.all-clad.com/contact or by phone at 1-800-255-2523. We apologize for any inconvenience, and we hope that this helps!