[fazool]

Common topic. You will hear lots of wacky ideas (coffee, febreeze, baking soda, etc.)

None of those work.

The only way you can really remove odors is to oxidize the odor particles.

Get an ozonator (ozone generator). A real one, not a toy. You can buy one on Amazon for about $120 or rent one from a tool rental store for about $30/weekend.

This is what hotels use to remove smells (like cig smoke) from rooms and it is the only scientifically-foundational way to remove smell.

I've used one and it was nothing short of miraculous.

There are cautions however. The ozone is a serious respiratory irritant (not deadly just irritating) and it removes breathable O2 from the air (converts it to O3) so pets can suffocate if enclosed with it. I would put my guitar/case/whatever in a car and run it for 4-8 hours. It makes the car smell clean too.

You have to leave a window slightly open so there is a source of oxygen to supply the ozone.