1. Use a cleaning agent. Pour the cleaning agent into the cooler, add an appropriate amount of water, and the cleaning agent will effectively dissolve and remove scale and rust, making the cleaning more thorough.
2. Acid-base cleaning method. Pour a mixture of acid and alkali into the cooler, referring to the cleaning agent's instructions for regular cleaning to remove scale and prevent corrosion. However, caution should be exercised when using this method to avoid damaging the equipment.