Cleaning your carpets can be a chore in itself. While it's highly advised that you hire a professional cleaner at least once a year, you may find that you want to do cleanings in between. This is perfectly fine as long as you avoid the mistakes that are commonly done by homeowners below.
Overshampooing – This is by far the biggest mistakes that homeowners make when doing their own carpets. They use too much cleaning solution and don't get it all out of the carpet. This will leave behind a residue. Once the residue drys, it will start to attract more dirt than ever before. Think of the carpet cleaning residue as a dirt magnet. If you're having this problem, then you should be scheduling an appointment with local professionals. You can find a list of them at http://www.statecollege.com/business/detail/weavers-carpet-cleaning,10797/.
Staining From Furniture – Most furniture has a stain coat on the outside. This can seep into the carpet if the carpet is still wet when you return your furniture to their normal spots. Some furniture, especially wood items, will release a die when wet. This die will seep into your carpet fibers and stain the carpet. You may not notice this at first, but next time you move your carpets you're likely to notice it.