New Jersey businessman Dennis Lee says he can make your car run on pickle juice, Listerine, Coke — pretty much any liquid. He has a machine, he says, that can supply electricity to your home for free using magnets. His nontoxic Insect-a-shield bug repellent is drinkable, he claims. Attorneys general in at least nine states say Lee's claims are fraudulent. In nearly 20 years of pitching free electricity and other products, he has gained a reputation among regulators as one of the country's most persistent traveling salesmen. He's not allowed to sell "products, services or business opportunities" to Washington residents,...