Dicor now makes their own product but before they came out with it they suggested good old Spic & Span.
Basically think Kitchen Floor
Things I take topside with me (or toss up ahead)
Mop or car wash brush (I use a"Van wash" Brush, telescoping handle is same length (Extended) as a mop and it seems to work better, though itis messier than a floor mop since it is designed to loosen the dirt,not take it away) Bucket,,Spic & Span and a garden hose with sprayer.
Sweep off loose debris and return broom to ground (HEADS UP style usually)
Fill bucket 3/4 full while adding Spic & span
Starting as far from ladder as I can work in like 3 to five foot strips.. Bursh well to loosen dirt and such, then spray to rinse it away.
Work toward ladder
Finally do last sction while standing on ladder..Return all hardwar to ground Go up tomorrow and was AC shrouds. and other "Sticks up and is painted" stuff DO NOT WAX ROOF (Do not wish to slide off)
Home is where I park it!