But if this approach is too frustrating to be accepted, you have another option, unless you invest in a new cooktop. Consider purchasing a replacement stainless steel top for your model. If you’ve got this handy, you’re in luck. If not, you can try to verify the number on a label that Bosch displays under its units. There might be a cabinet underneath where you can use a flashlight and have a look. Or call the company’s customer service, 800-944-2904, and ask for help determining the number and number of the replacement part. Then search the websites for home appliance parts companies, such as partselect.com, appliancepartspros.com, and repairclinic.com. These websites often also contain illustrations, where you can confirm that you have the correct part number. Before ordering, set a delivery time. Pandemic shutdowns have disrupted supply chains and there is often a long wait for parts and devices. “If what you need isn’t in the United States, you might have to wait a long time,” said a customer service representative for PartSelect who would only give her first name, Pam.