(ABC NEWS) -- Lovers of movie-theater concessions, beware. Nearly everything behind that glass case is steeped in, well, beetlejuice. The hard, shiny shells on candies are often made from shellac, a resin secreted by the lac bug. You may know shellac from its more famous work in varnishes and sealants, but it's also a mainstay in pill coatings, candy, coffee beans, and even the waxy sheen on apples and other fruits and vegetables.
How to avoid it: Leave that candy in the case and grab a veggie brush for your produce -- even if it's organic. (That's right: shellac can even be used on organic foods. ) These waxes can be difficult to remove, so you'll need to scrub.