The answer to 'why is my countertop moldy' is that mold can grow on countertops due to excess moisture, poor ventilation, or improper cleaning. Mold thrives in damp, humid environments and can appear as discolored spots or fuzzy growth on the surface.
Common causes of mold on countertops include spills that are not cleaned up promptly, high humidity in the kitchen, and using the wrong cleaning products. Mold can also spread from other areas of the home with moisture problems. If left untreated, mold can continue to grow and spread, potentially causing health issues.