Your cellar or storage area should be clean and free from any smells from food or other items.
Strong outside smells can find their way through the cork and contaminate your wine. This includes Bleach and gasoline. Store them someplace else, and nowhere near your valuable wine collection.
If you can’t afford a climate control unit for your wine cellar, then make sure there’s good ventilation. Keeping your wines under the house is a pretty good start if there’s proper ventilation. If not, you will probably end up with a musty moldy smell in your wines.
Keep the area clean to deter mice and insects from living in the vicinity. They’ll chew the corks and they’ll gnaw at the labels. Can you imagine bringing one of your treasured bottles out to your dinner guests with a label that looks like Swiss cheese? Some dust is OK. It will add to the authenticity and even some cobwebs will add to the conversation. But you really have to draw the line when it comes to a rodent chewed label or cork.
Clean and odor free
Reference by the Gurdies Winery
Your wines will fetch much higher prices at auction or market if they are in pristine condition, in their original packaging and show no signs of heat stress. Finally you should never store any fruit, vegetables or cheeses near your wines or anything else that is likely to ferment. And anything that has its own yeasts has no place in your wine cellar.
Summary: Keep the area clean and keep it dedicated to your wines.