I keep all my wool garments in garment bags (I learned the hard way) and I keep a couple of cedar planks with hangers sandwiched in between the garments.

But additionally, I use an oil called Texas Cedar Oil to refresh the cedar planks every now and again.

I pour a little Cedar oil on a paper towel and wipe down the wood then I toss the paper towel in the bottom of the garment bag.

My kilt, my hose, my bonnets, my P-37 BD all reek of cedar, but it is a good smell--earthy and clean. It is also comforting because it tells me all is well with regard to moths.