I have an tool you can buy that attaches to any power drill. It has spinning brush attachments, bucket scoop for large heavy debris and a water sprayer that you can attach a hose to rinse it all out with. The cool thing is that it has extendable poles that are 4 feet apiece for 2 and 3 story buildings so you don't risk climbing up a latter and falling. I charge $1 a foot for one story and $2 a foot for 2 story or for gutters with large debris (like plants growing out the top).
P.D.Q. Landscaping LLC
Lawn Care & Pressure Washing
"Offering Pretty Darn Quick
Services, at a reasonable price"