You may not have to clean the inside of the gutters but after having the leaf filter installed last year every thing stays on the top and needs to be cleaned twice a year.Mold collects on the top and does not let water thru so water just runs off onto the ground.
It all so does not wash the leafs or pine needles off. This does not work, I spend more time cleaning the top of the cover than I would have cleaning the gutters. The installation was done poorly as well The gutters are dirty now as well.
I would not recommend this to any on it is more work then it was worth.See attached picture all the gutters are now this way.
Review about: Leaffilter North Filter.
Reason of review: Bad quality.
Monetary Loss: $1320.
Preferred solution: Let the company propose a solution.