We have a lot of chat on here about best or quickest chemical or detergents for gutter/fascia n soffit cleans.
Personally ive found chemicals or detergents mostl slow me down due to the extra work. Soaking, applying and a tonne load of rinsing. Ive found that sometimes a good brush and hot water is all thats needed.
Infact, done a very quick video to support this claim. But to point out a couple of things!
This isnt a gutter /fascia clean. Its very dirty and low level so i filmed cleaning just the edge with one hand holding camera and one holding brush. (Harder than sounds)
Ive turned sound off as when i played it back im sniffling too much (caught cold of my kids) .
https://youtu.be/4X9dFYOyL24