Many of you have probably heard of “Scotch Guard”. Scotch Guard is a brand name for carpet protector. There are many brands of carpet protector but the key is to use carpet protector. When you buy your carpet new it comes with carpet protector but over time that protection wears off and needs to be reapplied. Carpet protector works by lowering the surface tension of the fibers (makes it smoother). This creates a powerful invisible shield around your carpet’s fibers to keep dirt from lodging within the carpet.