Since you don't have kids yet. Pop the door off. Pull a fan in the hallway and blow air into the room. When you sell the place, put the door back on.
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How many times must one fix something before it is fixed?
This is not a DIY site.
You are asking how to do things.
You have a few options on the table.
I'm closing this one.
Perhaps you should have read the instructions before calling.