We have just bought a new Samsung DW60M6050FW/EU Dishwasher. I am not sure if the cardboard in the back of dishwasher needs to be removed (see attached pictures). I have tried, but it seems it is not easy to peel it off. Should I just keep it? I am worried it may obstruct the heat dissipation and damage the machine. I asked Sumsung support, and they didn't even give a definite answer. They said "you could keep it, or you could remove if you see any issues".