just leaflet everything, u dont know who wants a wc, the house with the dirty windows might not want a cleaner, but the clean house might
if u are just leaflet certain street, u might as well just knock and cherry pick the houses, its a numbers game, i recently put out about 1500 leaflets and only got 7-8 off it but a few gutter jobs, but will be putting 10000 a month out for 6 months, once i get time, to see out it goes