Ideally, a sponge for washing utensils should be changed every two days. Otherwise, there will accumulate such quantities of harmful germs and bacteria that next pomyvka dishes make it a dirtier. Salmonella, for example, feels good on the porous surface of the old sponge.
Plastic cutting board
Plastic — not the best material for cutting boards. Over time, the micropores formed here, where clogged bacteria. All new food to, respectively, are infected. Go for quality wooden boards: wood contains resin, which is a natural antibacterial agent.