I tried the foam (Gutter Filter) and I must admit I was happy for a while then very disappointed. As others have mentioned my roof pitch was just too steep for the caps. The foam seemed like a great option. The product worked fine for about 3 years. After that, it started getting clogged with debris or shingle grit. When I would remove it to clean it, pieces of the product would break-off or crumble (even in locations without direct sun). After 5 years, I completely removed it. I'm back to cleaning the old way for now.