how to steam clean LG microwave oven step by step process

in a hardly mixing bowl take dome water and add a piece of lemon /2 spoons of vineger.now switch on the oven and select the option steam clean. it shows 10 on the screen. now cleaning process is started vapour is getting out from the water and spread inside the oven after 10 minutes oven automatically off it shows end.now bring the bowl carefully out from the oven and wipe out the oven with a clean cloth.
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