I don't like the plug-ins either. I find that they're worse than the sprays, because it's constantly there, and the smell it too strong for me.
Have you tried something like Arm and Hammer Fridge-n-Freezer Odor Absorber?
It's like putting it in the fridge, but you can put it somewhere around the cage, and it doesn't have any smell.
Have you tried something like Arm and Hammer Fridge-n-Freezer Odor Absorber?
It's like putting it in the fridge, but you can put it somewhere around the cage, and it doesn't have any smell.