Quote Originally Posted by smilingcat View Post
Have one of those over the stove microwave with those useless venting system.
So do I. Most of them have a pretty useless venting system.

Keep the smoke/co2 alarm, heck get more all over the house but can you move that one?

How well is the room ventilated? Ceiling fan? Can you get the air moving otherwise?

Installing commercial grade hood would be expensive. I don't know your budget. Even then you could use more air.