Any one out there that had or has a chemstractor .Can you tell me how you use or used yours ,As ive just phoned chemspec about some chemicals and he told me that you should put 1 ltr in the container as this produce,s the foam that you brush into the carpet and then the next day you have to vac the carpet to remove the dirt that has being trapped in the foam .Ive never put that much no 161 in the tank What do you think Des