Unplug the refrigerator from the power supply and remove all the food from the compartments. Open the door and let the ice completely melt. It will take from 20 minutes to 2 hours, it all depends on the frost layer. Do not try to speed up the process with hot water or a Hairdryer, the technique can be damaged, and the repair of such failure will cost you a round sum.
Once the refrigerator is completely freed from the shackles of the ice, wash it with warm, soapy water. Clean the hole for the stack of water from condensation, it is located in the refrigerating chamber and it stuck a plastic stick. After washing, leave the doors of the compartments open to dry.
After a short period of time to see if the dried up fridge, if Yes, close the door and turn on the power supply cord into the power outlet. Products is better to not upload, wait until the refrigerator has become cold. In the first hours of a special tray, in which is collected the melt water, evaporate all the liquid.
Put all the products in the compartments and can forget about defrosting the fridge, because next time it will have to be done no earlier than a month, unless there is an unexpected circumstances.
Do not use for cleaning of refrigerator toxic substances, they can get into food and cause severe poisoning.