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Insects are a nuisance anytime they invade a home or automobile, and they can be problematic to deal with due to their small size. Some bugs are the size of a pinhead, so they can easily slip into the house through cracks in window frames and other small openings. If you notice pinhead-sized insects starting to accumulate on or around your windows, getting rid of them should be a priority before they can propagate and increase their numbers.
Swat the window with a flyswatter to kill some of the insects. Bugs as small as a pinhead can be difficult to crush but you can eliminate some of them through traditional crushing methods.
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Spray the window with an insecticide to kill off the remaining insects if you are still having problems with them.
Clean the glass by spraying it with white vinegar and water in a half-and-half solution. This will remove the insect remains from the glass and will clean the insecticide off the window. Wipe away the vinegar solution with a microfiber cloth to remove the debris and get the glass clean again.
Add a drop of dish soap into the solution of vinegar and water if your windows are streaked after just using the vinegar.