The answer to 'gutter mildew' is that it is a common problem caused by moisture, lack of sunlight, and organic debris buildup in gutters. Symptoms include black, green, or white discoloration and a slimy texture. Solutions include regularly cleaning gutters, using gutter guards, and applying a mildew-resistant sealant. In many cases, DIY cleaning is sufficient, but for extensive mildew or difficult-to-reach areas, it's best to call a professional gutter cleaning service.
Mildew growth in gutters can lead to clogs, water damage, and even roof and foundation issues if left unchecked. Maintaining clean, well-functioning gutters is an important part of home maintenance.