The other common cause of reappearing stains is something referred to as wicking.
Yellow spots on carpet after cleaning.
The solution back then was to get citric acid and mix it at 6 oz per gallon of water.
The kind of yellowing is noticeable because it is a very bright canary or legal pad yellow.
There are two primary causes of carpet re spotting.
When stain resist carpet came into existence many yellowing discolorations appeared especially after cleaning.
Unfortunately many of these do not work.
They should be able to get the remaining high ph out of the carpet bring things back into balance and get it looking great again.
These stains occur if there is too much cleaning solution and water used during the cleaning process.
Mix a cleaning solution of 50 50 warm water and white vinegar.
Either way it can be quite annoying to see spots and stains re emerge on a carpet you thought was just professionally cleaned.
Sometimes spots can reappear as soon as the carpet dries.
One originates below.
Realize that having carpet along with children or pets will mean stains from time to time.
To rid your carpet of foul smells first blot any strongly affected spots with a damp cloth.
Cleaning old stains with a steam iron treat your carpets to a steam cleaning without having to rent a large steam cleaning machine to treat a small spot or area.
Another reason these brown stains occur is that dirt that is usually deep down in the carpet resurfaces as the carpet dries.
You may notice brown stains on your carpet after a thorough carpet cleaning.
This solution will be pretty strong because the concentration of vinegar.
You could apply that to the spots and watch the yellow disappear.
Now give the rug a healthy sprinkle of.
Next blot the area dry with a clean dry cloth or paper towel.
The age of the carpet is also important.
There was a time about 20 years ago when we were seeing yellow spots appearing on white carpets.
As the carpet dries the brown or red color remains on the tips of the tufts.
These changes produce brown or red colorants lignin which can wick up to the face yarns and appear on the surface of the carpet after cleaning.
Wicking occurs when the substance that was spilled on the carpet has soaked through into the backing of the carpet and sometimes even the underpad when you clean the stain you are cleaning the surface of the carpet.
It was traced back to the cushion and pressure from the mills put an end to it.
Ammonia and water will normally do the trick for most stains including urine and other yellow stains.
If your carpet has brown spots after cleaning call back the company that you had clean your carpets.
Many expensive cleaners are on the market.
They should come back out and re rinse the carpets with an acid rinse.