The squeeze on youth vaping in Colorado has tightened a bit more, as Lakewood moves to more rigorously regulate the sale of electronic cigarettes and other tobacco products in the state’s sixth-largest city. The ordinance, which took effect Saturday, requires any retailer selling non-cigarette tobacco products — such as e-cigarettes, cigars and chew — to get a license from the city and check identification to ensure no one younger than 18 is buying the products. The city’s new regulation also prohibits self-service displays of non-cigarette tobacco products unless the retailer is already an age-restricted tobacco business. “I think what we’re trying to do is make the retailers accountable,” said Margy Greer, Lakewood’s city clerk.