Reconstituting Finishers compounds

Has anyone successfully reconstituted dry/semi-dry Finishers compounds? If so, what did you use to do so? My green-capped compound is going dry fast!

I haven't used Finishers, but I regularly use water to thin Tamiya compounds. I usually do this as i use them- adding a couple drops of water to the cloth I'm using for polishing.

just water....
i always add a little soap, cause it just makes water 'better'.

I did it once and it is as easy as the others said... just add some water and they are fine again.