The answer to this is going to be to install gutter guards.
Best way to keep leaves out of your gutters.
It blocks leaves from entering but easily allows water through.
The theory is similar to flat screens described above in that the insert will let water through and keep debris out of the gutter the top of these inserts are essentially flat when installed into a gutter.
If you live in house that has any trees around it gutter guards are going to be a great investment.
This gutter insert is a plastic mesh foam filter.
Gutter guards come in different materials and designs but all hold a common purpose keep the leaves and debris out of your gutters.
Surface tension from the curved lid channels water into the holes without taking leaves with it.
Surface tension guards work very well with leaves and other large debris.
If you have a lot of trees on your property then another good way to prevent a lot of leaves in your gutters is to regularly trim your trees.
These guards range in price and usefulness.
It installs under the gutter ferrules to protect it from blowing away in high winds.
Your job brushing aside any accumulated debris from time to time to prevent runoff from cascading over the face of the gutter.
Small debris sometimes gets in but usually washes out the downspouts without a problem.
How they work a vinyl plastic or metal grid sits atop the gutter letting water in while keeping leaves out.
This will at least help reduce the amount of leaves you will have to clean up.