A fly in, fly out flyman came to spray today. (Yes, we spray for flies, with long lasting pyrethrin. Deal. There are a lot of flies in summer, this way there are many less in and around the house. When you live here you can tell me how toxins are bad. In the meanwhile, I suggest you consider that the pollution level in most cities makes the stuff straight out of the sprayer nozzle look good, let alone our normal air. The blowlflies are a summer problem, largely due to the huge amount of dinners (aka roadkill and livestock - roadkill because we have very high numbers of wild animals, and livestock because this is an extensive farming area. Animals die, sheep get fly-struck.) You can screen most of them out, but my wife decided the kitty door could not have a flap, they would never learn to use that. So one hole, in come the blowies.
Anyway, because you're supposed to leave the windows alone for a month after I did a window-washing this morning... I think I should start offering my services, because it gives me a chance to sing George Formby songs. And besides it's work I'd gladly pay to have done, so therefore others would probably feel the same way.
And for the discovery channel - inox (spray lubricant, good for rifles) makes not a bad aerostart substitute if a small squirt is applied inside the air intake of a brush-cutter. (400 pulls later we find this out).