BATON ROUGE — Scores of drivers rolled into the Benny's Carwash on Siegen Lane Friday evening as the business launched its sixth annual Haunted Carwash.Spooky, costumed employees greeted motorists before sending vehicles through a fright-filled wash tunnel, transforming a routine chore into a Halloween thrill ride.All proceeds from the event benefit Our Lady of the Lake Children's Hospital. Over the past six years, the annual fundraiser has gene…