I've found the following methods to have varying levels of success at getting rid of that old horn smell:
1) Charcoal in a pantyhose - Tried this as charcoal does a great job at eliminating odors from fish tanks. Works pretty well and charcoal is cheap
2) Baking Soda - Baking soda is corrosive so I generally don't like this choice. Putting a box of it in an empty case followed by vacuuming works well but sometimes the smells come back.
3) Fabreeze - I'm not sure what is in this stuff but it does seem to work for a bit. It requires the case to be resprayed periodically and then you are left with a Fabreeze smell which some may not like
4) Sunlight - Placing a case in the bright sun seems to do a lot for getting rid of some odors.
5) A new case - sometimes there's no rescuing an old case. Mold or mildew has gotten into the wood and no matter if you take the whole case apart and paint it with Kilz . . . eventually the smell will come back.
1) Charcoal in a pantyhose - Tried this as charcoal does a great job at eliminating odors from fish tanks. Works pretty well and charcoal is cheap
2) Baking Soda - Baking soda is corrosive so I generally don't like this choice. Putting a box of it in an empty case followed by vacuuming works well but sometimes the smells come back.
3) Fabreeze - I'm not sure what is in this stuff but it does seem to work for a bit. It requires the case to be resprayed periodically and then you are left with a Fabreeze smell which some may not like
4) Sunlight - Placing a case in the bright sun seems to do a lot for getting rid of some odors.
5) A new case - sometimes there's no rescuing an old case. Mold or mildew has gotten into the wood and no matter if you take the whole case apart and paint it with Kilz . . . eventually the smell will come back.