Here's how I do it... Use this Dye... IT's made by Wilton you can get it at any store that sells cake stuff...
Put 16 oz of warm water to a hole bottle of coloring and mix well.. I put mine a a bottle that you can close tightly and shake. Then I put the dye in a tupper ware container and dip my woods or what ever I am dying in the dye for about 10 seconds then I lay the wood on a cookie cooling rack wait an hour and dip again for another 10 seconds or so.. Then let dry for 1 to 2 days to ensure it drys completely... and your done... Hope this helps... I know other people will have other suggestion for you too...