When the liquid nitrogen tank is idle, rinse it with clean water, drain the water with a hair dryer, and place it at room temperature.
After the liquid nitrogen in the liquid nitrogen tank is volatilized, the residue (frozen sperm) will soon melt and turn into a liquid substance that adheres to the tank lining and corrodes the aluminum alloy.

The specific measures are as follows:
1. Take out all the liquid nitrogen in the liquid nitrogen tank and leave it for 2 to 3 days until the temperature rises to 0 degrees Celsius;
2. Pour in warm water at 30 degrees Celsius and scrub with a cloth;
3. Invert the jar or air dry.
Note: During the whole process, the action should be slow, the pouring water temperature should not exceed 40 degrees, and the total weight should not exceed 2kg.