When you decide to rearrange your life and find that a neighbor has left footprints on your wife’s carpet, don’t despair. Lay down a wet towel, folded in two, and steam it gently with a hot iron. If that fails, use a felt-tip pen and treat the bare threads individually. Remember: the more often a rug is shaken, the longer it will live. Dirt trapped underneath grinds down the threads.