The concentration of pesticide in fabric builds with successive exposures, and the more concentrated the pesticide, the more difficult it is to remove in laundering. Research at Nebraska shows that pesticide residues at the end of five days of repeated contamination were greater in fabrics laundered on the fifth day than in fabrics laundered each of the five days. Additionally, the pesticide residue in the waste water from laundering only on the fifth day was much greater than the waste water from the fabrics laundered daily. If the presoak cycle on the automatic washer is used, let the presoak water drain, then refill with fresh water for detergent washing. Launder separately from other clothing .
Residues do transfer from contaminated clothing to uncontaminated clothing during the washing cycle.
Wash together only garments contaminated with the same pesticide, since a combination of pesticides makes removal of each pesticide more difficult. Use a full tub of water for a limited number of garments to maximize residue removal in laundering. Use hot water. For laundering, the hotter, the better. Rinse temperature is not as important.