Hi, how about keeping the lid closed? Haha. Only joking. What about leaving the box open and exposed to sunlight?
Spread baking soda inside and close the box for a week or two. Exposure to direct sunlight also works but you run the risk of sparrows pooping in the box.
the weather here in New Mexico has been 85+ and sunshine since April. The rainy season just started. Figures.
In a 90 year old farmhouse mouse poop is a much greater risk. I had to hardware screen my amplifiers after I vacuumed out the pack rat berries.
Haha, I recon your cigar box would smell better than your amp, especially after it warms up.
I like the smell of some of the leftover cigar aromas.
Just sprinkle some Parfum of choise on the inside ! repeat if wears off !! simple but verry effectif ! fluid works better then airosoles they tend to evaporate more quicly !!