Wet or greasy cutting boards are hazardous because they can cause knives to slip, leading to cuts, and they can harbor bacteria, increasing the risk of foodborne illnesses.
A wet or greasy cutting board creates a slippery surface. When you apply pressure to cut food, the knife can easily slide off the intended target due to the lack of friction. This increases the likelihood of cutting yourself, especially if your fingers are close to the blade. Furthermore, the moisture and grease provide an ideal environment for bacteria to thrive. Bacteria like Salmonella, E. coli, and Listeria can multiply rapidly on a dirty cutting board, contaminating the food you prepare and potentially causing food poisoning. Wood cutting boards, while aesthetically pleasing, are particularly susceptible to harboring bacteria if not properly cleaned and dried. Plastic cutting boards are generally easier to sanitize but can still become breeding grounds for bacteria if scratched or scored.
To prevent slips, place a damp towel underneath your cutting board to keep it stable. To minimize bacterial growth, always wash your cutting board thoroughly with hot, soapy water after each use, and sanitize it regularly with a diluted bleach solution (1 tablespoon of bleach per gallon of water).