Hello, this is a strange problem with the refrigerator at home - a black liquid, similar to zift, has been leaking for some time. Extremely difficult to clean. Separately - the refrigerator is large and the old owners have decided to install it, which is not a good idea. So far so good. I assume that the condensate drain pipe is clogged and / or the overflow tank is overflowing. I don't have much money to call a refrigeration technician, give advice on how I can handle it on my own.