Having your carpet cleaned annually will help you to get the most of it. The cleaning will also help the carpet to look newer and smell fresher. Allergens like pet dander and pollen will be removed much better with professional cleaning than with DIY cleaning. Also, when you have professional cleaners come out, there are a number of extra services you can have done that can be well worth it. You can learn more about some extra options you can choose to have done here: 

Stubborn Stain Removal

When you have your carpet professionally cleaned, it will automatically remove many stains that aren't stubborn. The type of stain is what determines if it is stubborn or not. For example, things like stains from wine, red juices, and grease can be stubborn stains that are extremely difficult to get out of the carpet. In fact, many homes have these types of stains until the carpet is finally replaced. This is often because the homeowners finally give up on getting the stain out after several of their own attempts and after having the carpet cleaned without opting for the special stubborn stain removal service. If you have tough stains, you should seriously consider having the carpet cleaners work on the stain by adding on this service.

Stain-Resistant Treatment

Once you have had stains removed from your carpet, you will want to do what you can to prevent them from happening again. Or, if you have carpet that's still in great condition, you will want to keep it that way. You can opt to have the carpet cleaners give your carpet a stain-resistant treatment. This treatment is done by applying a stain-resistant coating to the fibers of the carpet that helps to prevent stains from setting in. 

Staircase Cleaning

Many carpet cleaners don't include staircases in the regular cleaning. If you have a staircase that doesn't get a high volume of traffic, then you may not need to have this done with each annual cleaning. However, for stairs that get a lot of traffic, it can be important to have it done. If you don't, then the carpet on the stairs can go flat. This is why it's also critical to vacuum the stairs when you vacuum the rest of the carpet. 

Upholstery and Rug Cleaning

If you have upholstery and/or rugs that are also in need of a good cleaning, then consider having the carpet cleaners tend to these things as well while you have them there cleaning the carpet.