Copied this from the web.....apart from the airing outside bit, it sounds a bit harsh:blink: Maybe airing then Briwax polish would be safer to try first.
'Eliminating musty smells from wood furnishings
Wood furniture stored in damp, poorly ventilated conditions can develop a musty odor. To eliminate the smell, place the pieces outside in the sun on a dry day. Remove all the drawers, open the doors and let Mother Nature have at it. This will remove any remaining moisture and may improve the smell.
If you can't place the furniture outside, at least put it in a well-ventilated garage or shed and direct a fan to blow air on all the pieces. Allow them to air out for several days.
Scrub the surfaces with solution of 50% laundry bleach and water. Follow up with a scrubbing of 50% isopropyl alcohol and water. If smells remain, scrub with Lestoil. You can also leave small, open containers of Lestoil in the closed cupboard. Placing open containers of kitty litter or activated charcoal (available at aquarium supply stores) in the furniture might also absorb the odor.'