We had a home with a 10/12 pitched roof in NC. Since NC is
heavily forested with long leaf pines, we had many of them in our
lot and close enough to the house that our gutters were almost
continually plugged after every rainfall. A fellow in NC, as I
recall, decided that he could solve the problem using the same
principle where water flows down the side of a glass, rather than
pouring off the lip: surface tension. He invented the Gutter
Helmet http://www.gutterhelmet.com/how_it_works.cfm and we had
it installed on our house. 6 years after it was installed, I
needed to repair some fascia and lifted the Gutter Helmet up in
the area to remove the gutter. The gutter was as clean as the day
the Gutter Helmet installer cleaned it out. The stuff works great
and I heartily recommend it.

--
Nonny
Suppose you were an idiot.
And suppose you were a member
of Congress.... But then I repeat myself.'

-Mark Twain
..