Get a vac
Honestly just did a 30 metre (3*10) clean all full with water, silt and moss. Ended up having over 30 litres of solids in the drum! the fluids wouldn't drain away as the solids blocked the drain hole, so had t get my arm messy!
(note to self, get gauntlets!). Took me 20 mins to clear the gutters, and 40 mins to clear up and put my equipment away. £70 for that
The custy couldn;t believe how much stuff came out of their gutters! Got some photos to put on the website of this one..
Not one i would have liked to do via a ladder and bucket..