I've come up with a brilliant invention. I got the idea off a post from here with pics where he did a first clean on a upvc framed house that had green slime etc. He said he went up his ladder(this is a WFP man) and did the corners of the frames with his toothbrush.(My invention will also work for bird muck)
I've got to get the milk from the shop, but when I come back I will post a picture.
In the interval feel free to make sarcastic comments, but later when I post on this thread get ready to be astounded!