Actually, I thought it was ground coffee...not instant, but the regular ground up coffee. The beans don't have as pungent of smell. I have tried the dish of vinegar before after someone came to visit and smoked in my house. It worked amazingly well.
Just place coffee beans in an open container and place it on a shelf or on the floor in a corner. It does make an area smell good and I happen to love the aroma of coffee ;-) Coffee beans are also good to use when smelling more than one perfume at a time when shopping for a new scent because smelling the beans in between each new 'test' clears/neutralizes your sniffer ;-)
I was going to suggest vinegar for the closet, too :-)
I don't know about the coffee, but I do know you can remove musty odors by taking new, clean & cheap clay-based cat litter & pouring it into the leg of a pantyhose then tying it on to a hanger or setting it on a shelf. It's supposed to suck up moisture. This tip was originally for a musty car trunk, but would work for a closet too.
I spray Febreze on to my clothes in my closet to remove odors. I use the vanilla scent because it's light & fresh & not strong or floral. You can use the Febreze made for fabrics OR the kind made for air freshener. You can also set tiny cups of vinegar in your closet. Just put the vinegar into a bottle or a jar with a lid & fill the jar less than half way with vinegar (any kind) then poke holes in the top of the jar.
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