Water is the main thing that will determine whether you have a happy air plant. Get it right, and you’ll have many years of plant ownership ahead of you.
Let’s start with the #1 air plant killer: Too little water. Maybe it’s the no-soil thing, or the misconception that air plants don’t need a lot of water, but lack of moisture will kill an otherwise healthy air plant in short order. I recommend soaking the plant for at least an hour once a week. Plants that need a little more water might even get an occasional overnight soak (these air plants usually have lots of little white fuzzy bits called trichomes). An overnight soak may also be a good idea if you missed watering for a week or two.
Yes, your air plant can absorb moisture from the air, but the interior of most homes is pretty dry, and relying on an occasional misting won’t cut it in the long run. A spritz of water will evaporate pretty quickly, before the plant can absorb it. Soaking is really the best way to ensure sufficient water.
That said, you can absolutely mist your air plant or run it under the sink in-between waterings or if you’re in a pinch and can’t get to the weekly soak. Most air plants won’t suffer from one missed bath. If it did, it’s probably not great houseplant material anyway, and it would be worth trying another air plant species. The good news is that it’s hard to overwater an air plant, just don’t leave it sitting in water for overly extended periods, which could lead to crown rot. Crown rot is when the bit holding all of the air plant foliage comes off, leaving you with a super sad soggy mess.
I’ve also had good luck moisture-wise with air plants in the bathroom, especially if you have a family member who likes to take steamy showers!