Tell my wife she can’t burn scented candles in the house! Lol. I already make her go into another room to spray any aerosols on a rag before using in the room where the tank is. Been using Sprayway glass cleaner for years on the glass in the kitchen which is open to the living room. Never any issues. And you can smell that stuff throughout the house when you use it. Heck I used to use it directly on the aquarium glass back in the day. Spraying on a rag first “away” from the tank then using. Always use paint with little to no VOC’s. Like behr for example. It’s approved for use in nurseries. No powders are allowed near the tank either. I now use Ro/Di in a spray bottle and squeegee to clean the glass. Vinegar is preferred for stubborn stuff. Aquarium gloves are used most the time if I must stick my hand in the tank. Smoke from cooking in the kitchen can’t be a good thing, but never had any issues. If I know I have to mess with the tank I avoid coming in contact any kind of scented soap or what have you that day. Scrub down with alcohol or baking soda. I’ve wondered about burning wood in the fireplace during the winter months. Never had any issue, but you can smell it. If you can smell it, it’s in the air. If it’s in the air, some of it has to be getting in to the tank. With all the above stated, I do keep a closed top system with glass lids. Always have, always will. I’m sure it helps to an extent.