When I first started with wfp, a small problem I came across was cleaning first floor cills. How do you know if they are clean if you can't see them from the ground?
This applies more to first cleans when some window sills maybe covered in green algea.
So, after some thought, I went into town and got a plastic framed mirror from the pound shop. It's about 6" tall and 4" in width. I glued a bracket on the back of it and now just simply snap it on to the pole when doing sills above ground level. Then, just give them a good scrub, and check with the mirror to see if they are clean. Job Done!!
Well I thought it was a good idea
Rob