I'm trying to make white choc clay but having a problem with it. The first time I tried it it was too "greasy"....the next time it was hard as a rock.... what am I doing wrong????

What recipe were you using and how exactly did you go about it in each case? I've found that it IS a little bit greasy when you make it, although kneading it helps.

Go to http://www.hungryhappenings.com/p/melting-chocolate-and-modeling.html
This has really helped me