It's generally true that glass cooktops are scratch-resistant, but that doesn't necessarily mean they are invincible. When looking for cooktops, you'll find many that claim 100% scratch-free surfaces, but do not believe them. You should treat a glass cooktop or any other countertop appliance with care. Make sure that your pans are clean, flat, and free of burn marks, and make sure that you are using the correct utensils when cooking.