Sooner or later in the course of home repairs you're going to use a hammer and chisel on concrete. When you do, one of the first things you'll discover, even if you wear heavy gloves, is a persistent tingle in your hands and arms that sets in after 20-or-so good hard whacks. To reduce this effect, caused by excessive shock, punch a hole through a child's sponge-rubber ball and push the chisel through it. Then when you're ready to pound away, hold the ball and the sponge rubber will absorb the shock. Before you start hammering, also push the tip of the chisel through a square of window screen. When you start chipping away at the concrete, chips and chunks won't fly and make a mess. You solve the threat of getting hit in the face, as well. Just to be on the safe side, wear safety goggles and heavy gloves and then say "bye-bye" to tingles and chips. And that's the On The House tip for today.