To clean and maintain a compact refrigerator, start by unplugging it and removing all the contents. Wipe down the interior surfaces with a mixture of warm water and mild detergent. Pay special attention to any spills or stains. Rinse with clean water and dry thoroughly. Ensure that the refrigerator is properly ventilated and avoid overpacking it, as it may affect its cooling efficiency. Regularly defrost the freezer compartment if applicable, and refer to the manufacturer's instructions for any specific maintenance recommendations.