Watch this video on the Z-Gutter filter https://youtu.be/w8GxJTBh-Pc
A very good tip on making a gutter strainer that will make your gutter flow better for a longer time than the regular strainers you buy from Home Depot or Lowes.
Bergstrom Industries sell the Z-Gutter Filter https://bergstromm.com/product/z-gutter-leaf-filter/