All refrigerators have this hole. The correct name is the refrigerator drain hole, which is used to drain the water vapor in the insulation layer out of the refrigerator. If there is black dirt, it should be that some of your vegetable leaves accidentally fell in. Over time, it will turn into black dirt. It's not difficult to clean. Just follow these steps.

Tools needed to clean the drain hole: refrigerator drain brush, screwdriver.

Step one, turn off the refrigerator.

We can't work with electricity. Safety comes first.

Step 2, remove the back cover of the refrigerator to expose the water outlet. The arrow points to the rear water outlet.

We do this step in order to get rid of the impurities coming out from the back.

Step 3, use the drain brush to start inserting the drain hole and start dredging the drain pipe.

The brush head in front will bring impurities all the way to the water outlet water storage box below, and you can see the brush head coming out of the water outlet.

Step four, rinse with water.

Because some impurities may be too small for the brush to brush down, let's wash them down with water. Anyway, they are all in the water storage tank.

Step 5, clean the water storage box.

Let's open the back cover of the refrigerator in the second step so as to take out the water storage box and clean it. Put it back after washing, and put the back cover back.

It's finished cleaning here, isn't it simple? It's just a simple way to dredge the outlet pipe. How big a problem do you think this is? According to my above method, it is easy to solve. Try not to put the dishes too far back in daily life, so as not to let the leaves fall into the drain hole, which is troublesome to clean up.