Hi Goochie, I use my wfp all the time for fascia gutter cleans but not the insides of the gutters obviously, its a great way of doing them, i find it quicker than doing them of the ladder especialy if you pretreat with a detergent which i apply with a pump sprayer I got from BQ, If you loosen the nozzle you can direct a jet of spray at the areas were its heavaly soiled but its not always required as the green mossy stuff comes off realy easy.
Drew.