I would recommend if you wash your car at home, to continually use a wash/wax mixture type of car wash detergent, like Meguiar's Gold Class Wash - see the link below.
This way you will continually build up a waxy presence on your paint, which will help in the future for bugs to not stick as much.
Also its good practice for the life and beauty of your paint job, to wax your car as often as you can. But good practice would be AT LEAST once a year.
Then bugs should come off easier everytime you wash your car.