In the beginning you could use the pan normal During the first weeks a brown discoloration from center began (the color itself does not bother me) At this brown discoloration sticks each product immediately fixed (it burns on tight) After 4 months now, the bottom surface is colored brown to about 50% and everything is burning there now fixed Have this now claimed as material defect the dealer Answers from merchant: 1. Answer: This is a natural discoloration, no shortage 2. Answer: Quote from email: "The color changes in the ceramic pan are residues of food, which they have previously prepared in the pan These have been at that time not completely removed during cleaning, so that they are at the other uses of the pan. have burned or discolored " The pan was like all my other ceramic pans (which I already have several years) washed by hand Here an attempt is made to give the customer the blame for a defect Now I can only say shame shame, shame shame, ....