There are a ton of homemade "Febreeze" recipes out there, all of them pretty similar. I've just always made the recipe I found awhile ago, Fake-It-Frugal. I think it's better than the original, and it lasts forever and costs almost nothing. hint: I even use really cheap fabric softner too.
I use the old Febreeze bottle I had before I got smart and started making my own.
1/8 cup of fabric softner
2 tablespoons baking soda
fill with hot water to the top
Shake it all up and use.