Collection and disposal of the dirt has also changed over the years, but one component has remained, called the "Sani-Emtor". This is a component attached to the discharge tube leading away from the vacuum turbine chamber where the suction is created, where dirt collected and heavier objects were deposited, and a lid could be removed from the bottom and the dirt disposed. A cloth bag that allowed airflow to pass through and clean the air was attached at the top of the Sani-Emtor. Earlier versions of the cloth bag used a dense duvetyne, and later corduroy cotton and wool fabric bags where fine grit, dander and other foreign contaminants collected. Starting in 1964 with the release of the Dual Sanitronic 50, Kirby implemented an integrated cleaning pocket into the cloth bag, titled the "Sani-Pocket", where embedded dirt and hair could be dislodged from the interior surface of the bag while keeping the dirt contained inside. Starting in the 1960s, the cloth or wool fabric bag was impregnated with a fungus controlling substance Kirby called "KGF-40", which consisted of small amounts of zinc dimethyldithiocarbamate, and zinc 2-mercaptobenzothiazole, with most of the substance being "inert ingredients". Later the chemical was offered in a 12-oz bottle called "Germicide Deodorant", which could be sprayed on various surfaces with the Suds-O-Gun as a fungicide.