Came across this tip on Cooking Light.com on how to clean your coffee grinder after you grind up seeds (like cumin seeds). I haven't tried it myself yet but thought I'd pass it along.
"Clean the grinder to remove flavors that could permeate the next item ground. Wipe the grinder clean with a soft cloth, add a few tablespoons of uncooked white rice, and grind until rice turns into powder; repeat until the ground rice comes out white."
"Clean the grinder to remove flavors that could permeate the next item ground. Wipe the grinder clean with a soft cloth, add a few tablespoons of uncooked white rice, and grind until rice turns into powder; repeat until the ground rice comes out white."