http://www.gutterhelmet.com/ Not that I particularily have a problem with leaves in my gutters, but every year my wife and I go to the state fair and look at all the exhibitions and there's usually a couple of "gutter helmet" displays. We wind up arguing on whether they really work or not. It seems to me that leaves would still make their way into the gutter.. particularly skinny or small ones.. or, rainwater would bypass the gutter all together during heavy rains. Or, once they become dirty, the water would lose its surface tension and just spill over the gutter. Any gutter helmet users here?