After years of experimenting with mosquito nets that have been stuck with Velcro to the window frame finally have a solution that works for sure! The velcro solution is good as long as there is no wind. then tear the grid of the closures and are often no longer attached. The insects are in the house. These grids everything is stable. Nothing came from, the insects are permanently outdoors. And washing windows the grid are from and refitted within seconds. No fumbling with velcro strips! Just a quick-to-build solution that works. The assembly takes about 20-30 min.