There is slight water seepage at the bottom of the clay pot. You can add practical oil and lime to make it into paste and apply it to the leaking place. Dry it for two days after application, and then apply it for 3-4 times. It can repair the slow infiltration of ceramics. If there are cracks in the cylinder, it is necessary to reinforce the cylinder with U-shaped iron rivets, and then apply oil and lime paste to seal the cracks to make the cylinder watertight.