I purchased new carpet but I’m afraid to have it cleaned. They say once you have it cleaned it seems to get dirtier quicker.

The culprit here is Detergent Residue.  Most cleaners spray their detergents and water all in one step. As a result the detergent left behind on the carpet acts like a magnet and attracts soil. This causes spots to reappear. In my system, I incorporate a Clear Hot Water Rinse in the final step in my cleaning process. Hot Water Rinse removes not only the soil but also the detergents as well.  This prevents spots from reappearing and keeps the carpets cleaner longer.