Not sure if I mentioned it in this post, when I created it originally.
But, a good assortment of nylon or bristle, small brushes may be found in gourmet stores, particularly in the cake decorating or kitchen cleaning sections.
A toothbrush will work, but some may be too wide. Cutting away some of the plastic side of the toothbrush, to make it narrow enough to get into tight spaces, will work too.
"And lo, did I see an ugly cat. Smoke. Brimstone. Holes in parchment. And this ugly cat was much amused." --- The Prophesies of Gatodamus (1503 - 1566)