Laundering by hand involves soaking, beating, scrubbing, and rinsing dirty textiles. Tooth brushing is the act of scrubbing teeth with a toothbrush equipped with toothpaste. There are two primary methods of cleaning bulk tanks, via manual scrubbing or automatic washing. Washing or scrubbing the skin too much could make it worse, by irritating the skin. Proper cleaning can be achieved through physical scrubbing, sonication, ultrasound, or pulsed air. They can be removed using a combination of scraping, scrubbing and sanding. FRP Scrubbers are used for scrubbing fluids. This process involves physically scrubbing the skin with an abrasive. They tried scrubbing it away with detergents to no avail. "Bright" is a flat brush with shorter brush hairs, used for "scrubbing in". As explained above, alkaline sorbents are used for scrubbing flue gases to remove SO. Aqueous [Fe(EDTA)] is used for removing ("scrubbing") hydrogen sulfide from gas streams. Attempts have been made to remove both the fly ash and in one scrubbing vessel. There are a number of dry type scrubbing system designs. He left because he was unable to find a job other than scrubbing restaurant floors.