Thank you for your feedback. The ClearMax coating on the glass should not impart any discoloration to the glass. The ClearMax coating is not a substitute for regular cleaning, and the door should still be maintained on a regular basis. DreamLine recommends that our products be cleaned with mild dish soap and warm water. Please do not use anything abrasive or caustic when cleaning your Elegance shower door. We invite you to contact our DreamLine Customer Support Team at 866-731-2244 to discuss the door discoloration. Our technician will most likely request photos of the discoloration to better assess the issue. We can also be reached by sending an email to support@dreamline.com. Our hours of operation are 8am-7pm EST, Monday through Friday and Saturday from 9am-5pm EST. Thank you for choosing DreamLine and for your feedback. We look forward to helping you soon.