Did not and will not use this in our rides.... Mahirap pang linisin iyan....
Just let them be when driving. Ingat lang din when following trucks,- get close enough only when you're about to overtake.... Also, wash off your vehicle's front after a long drive, especially in the provinces at night....
I remember a swarm of bugs that hit my rented car's windshield as I entered a freeway abroad some years ago... You'll just be surprised when they hit you... Biglang naging dark ang windshield....