If your iron is dragging instead of gliding, don't toss it. Try this simple cleaning trick instead. Mix one part salt with one part white vinegar in a microwave-safe bowl. Microwave on high for about 30 seconds. Stir to dissolve the salt, dip a cotton rag in the mixture and rub the bottom of your iron vigorously. This should remove residue that is causing the dragging and give your iron a clean, almost-new shine.