Air Wick Plug-In Air Freshener Not Working Properly

I purchased an Air Wick plug-in air freshener for my bathroom. Even after experimenting with different fragrances, I'm still unable to achieve the same level of performance as when I initially purchased it. I've only refilled this product once before, so it's still pretty new to me and I haven't had it for very long. Despite the introduction of a different aroma and the limited space of my bathroom, there is still a lack of any noticeable scent. Wow, the machine broke already? That's disappointing.