Peter,
Cleaning and deodorizing is a liability term we use. In order to disinfect something you would have to prove that it killed 99% of the bacteria. Just because you topically apply a disinfectant, it does not mean that it has killed 99% of the bacteria.
Lets say in your marketing you write that you can remove 99% of the bacteria, mold and allergens in the carpet. You'd have to scientifically prove that through testing. And a client could have hired you because of your supposed claim. It just so happens their child has deathly allergies, and asthma. You clean the carpet, the child gets sick. You're a lawyers new bait.
It may be a bit overboard, but stuff like that happens more often than you think it might. And yes there are ambulance chasing lawyers that do look for crap like this to sue.
You can however say that you've SANITIZED the carpet. Soap and water cleaning is at the sanitizing level.