It’s fine now, even years ago you could do it but needed ventilation so I’m not sure what he was on.
You inspired me.to actually read the sticker, first line is " do not operate this appliance with the door open. "
I suspect he thought the ventilation was suspect.
@Backstop started
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It’s fine now, even years ago you could do it but needed ventilation so I’m not sure what he was on.