Stationed at the boat ramps at Lost Lake Drive and Baddacook Pond, a group of people wearing "Weed Watchers" t-shirts approaches boaters as they enter and exit the water. "Have you been here before?" Art Press, one of the watchers, asks a boater. The boater had, and knew all about clean, drain and dry, the steps recommended to prevent invasives from hitching a ride on traveling vessels. And after spending $95,000 in herbicide treatments last summer, the Massachusetts group hopes to spread this message to all boaters. According to Henry Baker, group volunteer, the education efforts seem to be working. "I rarely see people come into the boat launch with weeds already on it."