To cut down on cross contamination and avoid spreading illness, wash your hands as often as you need to, and wash them correctly. The 1999 Food and Drug Administration (FDA) Model Food Code states that hands and forearms should be washed using soap and 110°F/43°C water for twenty seconds. Wash your hands at the beginning of each shift and each new task, after handling raw foods, after going to the bathroom, and after handling money or other nonfood items, to mention just a few points in the workday.