Could not be arsed to get my washer setup as my back was killing me so did my first patio clean today just using hypo (sodium hypochlorite) 14/15% diluted 1:1 mixed in a window cleaning retangular bucket. After brushing then rinsing down the patio first using a normal garden hose also wetting down borders & grass I simply applied it to the filthy surface just using a chepo telescopic car wash brush to slap it on. I then let it dwell for about 20 mins then hosed it off. Job done Wow! how easy was that as it came up as good as new without all the hassle of using a pressure washer.