Choose one of two types of pipe: either rigid PVC with predrilled holes or flexible drainpipe cut with slits. “For maximum effectiveness, use 4-inch perforated PVC pipe,” says Lamprey.

The boots dry on perforated PVC pipes that waft warm, gentle air supplied by a light bulb and a computer fan. Build the box out of ½-inch-thick plywood, 1-inch deck screws, two light switches ...