Can anyone tell me how to rehydrate some of my color pastes that are getting a little dry. Thanks

Glycerin is used for thinning paste color, but I'm not sure if it will be useful if the paste is too dry.

I've heard that if you stick it in the microwave for a few seconds - it'll bring it back to life. I haven't tried it myself but I got this from a reliable resource. What do you have to lose?

If you are using the Wilton icing Colors buy a bottle of Glycerin you mix small amounts that into the dried up color and it restores it to a usable consistency