Disinfecting a Cake

A man finds a cake left open in the kitchen late at night. What would he do?

The paranoia in him, takes him to the land of cockroaches. That wakes up the logician in him. He scraps out the outer layers of the cake. Still not happy with his work of 'art', he decides to disinfect the cake. And how does he decide to do it?
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Microwave the cake for 6mins!!!! 

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