No matter what you do and no matter how you take of you carpet there will come a time that it will stink a wet dog in an alley, you may be frustrated because you have done everything to prevent this. However, I tell you can't prevent it you can only prolong the wait.
If the time comes that your carpet does stink you don't have to panic or you don't have to replace it. What you need are proper techniques on how to eliminate the odor.
Many commercially available products are on the market, well some of them are really effective to remove the odor in your Coker carpet, however be sure that the product is suitable for the fibers and type of your carpet for the best result.
If commercial products are not working for you or simply you are not a fan of them you can try various home remedies such as the vinegar mixture, ammonia mixture and hot water. Trying this methods can be fruitful but be warned that vinegar and ammonia may leave their own scent behind which requires about 2 to 3 days before they completely subside.
Detergent and water are always a best option to remove stains and odor to almost everything and the soap leaves a very pleasant smell but be sure you let it stand for a while to dry or otherwise the damp carpet might produce a more smelly scent which you have to remove again.
Steam cleaning is also a good way of eliminating various smell the steam penetrates beneath the carpet eliminating the bacteria and microorganism that causes the smell. Steam also make you carpet not only smelling new but also looking renewed and given a new life.
Ultimately, if any method above does not work for you, you might need to hire professional services to do the job for you and will save you all the hassle and stress of going through all the pain staking methods.
If your carpet really stinks and looks like a mess eventually you have to consider replacing them because probably your flooring covers had reached their time already. Many Discount flooring are on the market right now and replacing them won't be such a pain in your pocket.