This one’s for the pack rats out there who can’t let go of out-dated offices supplies even when they no longer serve a specific purpose. When tiles are installed, they’re kept in place with a gluey substance known as grout. While it effectively fills in the spaces between tiles, grout isn’t known for its durability. The soft, pliable surface tends to attract stains and mold, detracting from the look of otherwise clean tile. To stay on top of grout cleaning, rub the dry tracks with an old-fashioned typewriter eraser to remove mold and mildew stains as they appear.