This scent also covered odor from gym clothes well, and it was the only smell we could detect in our test vehicle.Īir Spencer refills are a little more expensive than what you’ll pay for some of the other best car air fresheners. We left it only half open as we thought it was slightly too powerful. The scent from the Air Spencer can be quite strong when the device is opened fully. Amazon reviews seem to support our experience, with several reviewers claiming that a single refill lasted well over a month. This is the longest-lasting of the scented car air fresheners that our team tested. Our testers enjoyed the scent but were most impressed by the style of the device as well as its longevity. Of the best car air fresheners, we had the top experience overall with this one. When the scent finally dies out, you can purchase refill packs in squash, lime, citrus, and crystal flavors. The bottom has a sticky adhesive that makes it easy to attach to your dashboard, but you can put the small, slender device anywhere in your vehicle. You can put the CS-X3 anywhere in your car. There are several different scents available, but we chose squash, which had a pleasant smell that was actually reminiscent of bubble gum.Ī sliding lever changes the gel insert’s exposure and thus the strength of the smell. The Air Spencer has two components: a plastic case and a changeable gel insert that releases scent.