Low moisture cleaning or encapsulation cleaning method as shown in video. I like this video because it shows with low moisture and a heavily stained carpet can look amazing without the heavy chemical and expensive truck mount. This is what we like to do for maintenance cleanings. Typically monthly maintenance with heavy traffic ares etc. Then once a year we would do a deep clean with the heavy equipment to get that deeper clean. The more attention your carpet gets a year the longer it will last saving you money in the long run. Plus cleaning often will help create a healthier environment.