Described is a retail store fixture that includes an electric charge circuit. The electric charge circuit generates a positive electric charge, or voltage, in response to the motion of a moveable portion of the retail store fixture. The retail store fixture can be a shopping cart or other fixture with a moveable portion. The positive electric charge is deposited on a part of the retail store fixture that it is desired to sterilize. The positive electric charge repels bacteria, sterilizing the portion of the retail store fixture that receives the positive charge. A shopping cart, for example, equipped with the electric charge circuit can be sterilized without requiring chemicals or power to be supplied to the cart. Rotation of the shopping cart wheels can be used to generate the voltage. The voltage can be used to sterilize a shopping cart handle, and/or other parts of the shopping cart.