I was looking from here out of the window and I thought I had something in my eye, ie there was a big blurry patch about 20 or 30 meters away that I couldn't really focus on to make out what it was, so just thinking there was something in my eye I didn't take any notice and carried on working, yet every time I looked the blurry patch seemed to be in the same area.
So I decided to actually walk to the window to see what it was, Thai wasps, millions of them swarming together in the sky

then I saw quite a few coming towards my open window, no screens up this high so I closed it, then I noticed I got about 100 of these poxy little Thai wasps on the inside of the window, I can't open the window to let them out otherwise their mates will come and join them, so have they come here to die or do I have to kill them, also which nasty chemical spray is best for getting them deaded the quickest as I have never been stung by one so don't want to be.