One of the most troublesome carpet stain sources is littered chewing gum, which creates a sticky mess and is often tread upon, thus ground into carpet fibers, before a cleaner can get to it.

While traditional removal methods have included scraping, freeze-drying and pressure washing, machines have evolved to deal specifically with this problem. Gum removal machines and tools target these stains specifically, treating them with a spotter or chemical liquefier before agitating the carpet fibers to remove the substance. Some are handheld and operate like a drill with a rotating brush at the end. Others have tools made to work with vacuum or steam cleaning systems, applying a special solution and attacking the stain before vacuuming it up in a liquefied or disintegrated state.