Remember when you were a kid on the 4th of July, and you set fire to sparklers?Pic® is something like that. Pic® is very eighties. It's a coil of pressed material made of chrysanthemum. Place the coil on a metal surface or in a metal pot or on a dish (think oversized ashtray), and then set fire to it. The active ingredient of pyrethrum smokes away and the smoke kills nearby mosquitoes, who drop dead when they come near it. Needless to say, Alaskans love Pic®. And hopefully use it outdoors. Pic® tends to be more effective than citronella. Health risks? Unknown.