This will at least help reduce the amount of leaves you will have to clean up.
Best way to keep leaves out of your gutters.
Small debris sometimes gets in but usually washes out the downspouts without a problem.
The answer to this is going to be to install gutter guards.
This gutter insert is a plastic mesh foam filter.
Surface tension from the curved lid channels water into the holes without taking leaves with it.
It installs under the gutter ferrules to protect it from blowing away in high winds.
With surface tension gutter covers water clings to the rounded nose of the guard and flows into the gutter while leaves and other debris fall off over the edge.
It blocks leaves from entering but easily allows water through.
Gutter guards come in different materials and designs but all hold a common purpose keep the leaves and debris out of your gutters.
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.
Surface tension guards work very well with leaves and other large debris.
These guards range in price and usefulness.
They must be brushed off from time to time or the debris that sits on them will disintegrate and eventually clog the foam or wire.
If you live in house that has any trees around it gutter guards are going to be a great investment.
Your job brushing aside any accumulated debris from time to time to prevent runoff from cascading over the face of the gutter.