I have one that is mostly white (a swan w/ 2 bears sitting on it's back) and it is almost GRAY from years of being handled and sitting on a shelf collecting dust. I can't seem to get the dirt out from between the little grooves in the "hair" (or, in the case, I guess, the "feathers"). I've tried a wet Q-Tip but it didn't do much.

Anyone have auny suggestions as to what kind of chemicals or solutions I could use, or any other techniques to get the dust and dirt off and out from between those tiny little porcelain grooves??

Thanks!