A common saying that many if not most would be somewhat familiar with is that some things just need to be seen in order to be believed. This saying is so prevalent in the world that almost everyone will have heard it in some way, shape or form, but we feel like it is not a very effective way to determine outcomes and results based on quality. A big part of the reason why that is the case has to do with the fact that sometimes what you can see with the two soft gelatinous orbs in your skull that perceive vision will not capture the full extent of reality at any given point in time.
If you need a more concrete example of this to work with, suffice it to say that San Tan Valley carpet cleaners can give you all the help you need. Many carpet cleaners note that customers who tried to clean their rugs themselves often complained that the spots they washed keep coming back after cleaning. This is usually caused by them believing what they see, which just goes to show that sometimes you need a bit of extra context to get to the crux of the matter.
You might have thought that your carpet was clean when the spots disappeared, but in truth the dirt that comprised these spots is very deep inside of the fibers. You likely only cleaned the topmost layer of dirt, and the lower portions came out when the carpet dried up. Just steam clean your carpet a couple more times until the spots stop coming back due to the underlying dirt layers having been thoroughly removed to an extent.