i had a p/w and ext lance for cleaning out awkward gutters, but i didnt use it for just fascias.
i found it too much of a pain.
i have now sold the said items, and i clean out the gutters using a ladder and if its awkward i turn the job down, as i dont need the extra work.
as for cleaning the fascias/soffits/gutters, i use ecover in a garden sprayer and hot wfp. alot easier than p/w, imo.