Sponge gutter guards, also known as foam gutter guards, are effective at blocking larger debris like leaves and twigs. However, they can trap smaller debris over time and may require frequent cleaning to maintain optimal water flow, especially in areas with heavy debris.

Sponge gutter guards are inexpensive and easy to install, but they may need regular maintenance to remove smaller debris that gets trapped within the foam. They are best suited for areas with minimal debris buildup.