Today in 1934 John Dillinger's reign ended when G-men tracked him down in Chicago. Homes have public enemies too, and topping the most-wanted list is "moisture," a crafty penetrator that leads to wood-rotting mildew. Next on the list are "air leaks" that waste energy and "ugly cracks" and "gaps" that steal beauty from your home. Your best defense is caulking, an inexpensive crime-fighter that stops these criminals in their tracks. As a rule, anywhere two different materials meet you need caulk; where door frames and window frames meet, where your home or your house meets the foundation, where pipes go through a wall or where a chimney meets a roof -- you need caulk. There are different types for different jobs. Be sure to get the right one. Remove old caulk first -- dirt and dust, too. Cut the tip at an angle, at the right point for the size bead you need. Hold it at a 45-degree angle in the direction you're moving and fire away. You'll lock these criminals out -- for many years to come. And that's the On The House tip for today.