How to kill a hornet without insecticide?

I live in a 12th floor apartment. Idk how the hell a giant creepy hornet came into a balcony despite anti-insect nets installed. I hate to use a chemical compounds like insecticide spray. Any idea how to slay it without that ? And, the creepy noise of hornet disappeared. Is it okay to stay calm and open windows of... show more I live in a 12th floor apartment. Idk how the hell a giant creepy hornet came into a balcony despite anti-insect nets installed.
I hate to use a chemical compounds like insecticide spray. Any idea how to slay it without that ?
And, the creepy noise of hornet disappeared. Is it okay to stay calm and open windows of my room ?
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