Many stains are instantly noticeable. But while a wine stain on a light-colored carpet or a gravy stain on a white shirt tend to jump out right away, other stains sneak past our radars every day.
Q: Eight years ago, I purchased a 1920s two-story home that has remained mostly original except for modern upgrades for wiring, heating and appliances. After moving in, we noticed a small stain on the ...