The very first thing you can do to keep flies away from your patio is to keep the trash bin in check. Mix molasses and cornmeal and place it in a shallow dish or saucer.
Always tie the trash bag before disposing them in the garbage bin.
How to get rid of flies on back patio. Also keep the trash and garbage bin covered at all time. Put the saucer far from your patio the flies can congregate there while you enjoy your meal in peace. Simply cut a piece of cloth into strips 12 inches long and one inch wide.
If possible move the trash bin as far as possible from your house. Moisten each strip with several drops of any of the following. Clove lavender lemongrass citronella eucalyptus.
This should help keep flies and other pests off your patio. To keep the flying bugs away place citronella tiki torches around the perimeter of your patio and or place citrus candles on surfaces such as tables or benches. Spray with hydrogen peroxide fill a spray bottle 1 3 of the way with hydrogen peroxide.