Aquatic invasive species are spread by overland transport of watercraft, trailers, and fishing and recreational equipment. The most effective way to prevent spread is through education and equipment inspections designed to catch invasive species "hitching a ride" from one waterbody to another. Preventing the spread of aquatic invasive species is far more effective and economically sensible than eradicating invasive species once they are established. With support from Vermont DEC, Public Access Greeters educate lake visitors about invasive species, provide courtesy watercraft inspections, and STOP introductions.