You glue them to the window frame? Each time you need to clean your windows you have to break the glue and put glue again to reinstall? Have you considered other options? My old windows’s removable pvc grids had a small rubber part at the tips of the strips that would compress when the grids are installed. That was enough to hold in place without using glue.
yes im sure there are a lot of different ways to secure them. with the glue its not permenant and easy to replace if needed. I would not need to take them out to clean them just hose them off.