For a rug under moderate use, the longest you should wait in between professional cleaning is two years. Entry rugs that get high traffic, or rugs that are in areas with a lot of activity from small children or pets, can be cleaned annually. Because wool has the ability to hide a great amount of soil and contaminants before it “looks” dirty, a consistent dusting (vacuuming) routine is important to help you extend the length of time in between professional cleaning. Visit “home remedies” for proper dusting and spill instruction.