Water likes the path of least resistance, so occasionally water can run across the top of a leaf, or some other piece of debris, and onto the ground. This is a natural occurrence and in no way implies that the system isn’t working. Leaves can cover the opening of a reverse curve gutter guard, causing the water to run across it and onto the ground. And, unlike MasterShield, reverse curve gutter guards pull wet leaves, pine needles and other debris right into your gutter. MasterShield keeps all the debris out rain or shine.
MasterShield acts as an extension of you roof; if debris collects on your roof, it will also sit on the system. Debris can also take time to work its way down your roof and, in turn, down over the gutter guard.  In most cases, light dry debris like leaves are lifted away with a breeze.  Wet, heavy debris, like wet oak tassels that have knit together, take much longer to shed.  In the rain, water will again follow the path of least resistance and some may flow over the system.
For roofs that have debris sitting on them for an extended period of time (such as in sheltered areas like roof valleys or on shallow pitched roofs—your local independently owned dealer will likely identify these places with you), we recommend that you occasionally clear areas where debris naturally accumulates to keep the system working efficiently. Generally, however, water is much heavier than the debris it is mixed with, and gravity will pull most of it below the debris. In addition, MasterShield’s patented LeafRelease non-stick surface causes debris to quickly dry and blow away.  If you do have to occasionally brush off a section of your system, you’ll find it will continue to perform as well as sections where you don’t have debris build up.
Dealers are independently owned and operated and may choose to charge a service fee for warrantied and non-warrantied service calls.