I am not being metaphorical, in fact, I am talking about gutters on your roof. A few years ago I wasn't regularly cleaning my gutters and had a close call with roof leaks when we had an extensive period of rain and freezing that caused ice dams and all kinds of ugliness to many New England residents as well as friends of mine. I had a scare and since then I've been paying someone to clean my gutters each year.
Here's a far more 2013 solution to the same problem. Yes, Robots are no longer just for sweeping your living room!