This is a job that if you have the time, can easily be done yourself. Go to Home Depot and buy a "house wash" solution called Jomax, a sprayer and a brush on a pole. If you have mold Jomax can be mixed with bleach to kill it. Somehow Jomax makes the bleach less stressful on vegetation and should not harm it. Mix per instructions. Hose plants down with water before spraying house down and after house wash. Start from the bottom working up in an area you can keep from drying. Spray solution, let dwell, scrub lightly with brush and rinse with low pressure or a garden hose. That's it.
Then have your windows professionally cleaned -- BY ME!

What? I've got to get a plug in here somewhere. But seriously, if you really don't want to do it or don't have the time give me a call. I will be down beginning the first week of March and then tentatively around the beginning of April. Feel free to call if you have any further questions.
Kirk Reighard
Kirk's Window Cleaning
S.E. Michigan / Seagrove
734-751-2420/800-609-8717
kirk@kirkswindowcleaning.com