For those enormous foaming problems when someone has spilled a lot of detergent or you are extracting a carpet that has been spin bonnet cleaned for years you throw down a Crystal Powder Defoamer. Like you are feeding chickens. This then gets picked up with the extraction water and de-foams inside the hose before it reaches your soil tank where it could do damage.

 

The product is called Crystal Defoamer by Chemspec.

 

 

 

 

 

 

Listen to Master Doug.

 

First and foremost get the defoamer out of the rinse water tank, this is causing the stickiness and will also make the carpet re-soil rapidly.

 

Also do an evaporation test on your pre spay chemical.  Put a small amount in a cup and when the liquid  portion has evaporated away, what ever is left is what you are leaving on the carpet.  If it is powder that is good, if its sticky you have your answer.

 

 

One thing I've noticed though, is that when I'm done extracting, the slightly damp carpet is slightly sticky somewhat to the touch (is fine when it dries), but especially once I've touched the carpet and rub my fingers together. Is this normal ? Just so you know, the prespay is sprayed to specs on the jug, and, the instructions for the rinsing solution in my porty are also followed. I do use an antifoam in the rinsing solution(less than what they recommend which seems to work fine), and of course, I do an extra dry pass for happier customers. What do you think?