Best way to dry boots?

[Chokolite]

So I finally got rid of my old smelly boots, and I don't want the same fate again. With my old boots, I had just been air drying them/putting them on a vent and letting them dry that way, but after two years of use they smell like something is dead in there. My shoes don't smell (not even the ones I've had for four years and still wear regularly), so I assume it's some sort of issue with them not getting dry?
So, what's the best way to dry them out and keep them minty fresh?

 

[KellyK]

a boot dryer

 

[Pipe_Munky]

remove the liners from the shells and let them dry over night. do not put liners on a vent. if they are really wet, fill them with newspaper.

 

[Cincher]

Put in some scented dryer sheets for temporary relief.

 

[207]

boot dryers or place them next to a heater...