Re: griot's garage clay...
And I'm not a Griot's fanboy, I just like their products and the unconditional guarantee - if I don't like something for any reason within 6 months, I can return it and get my money back, plus a lifetime guarantee against defects.
Not knocking Zaino or any others, because I've seen beautiful results from a lot of products, but I don't see that guarantee on other sites.
I called Griot's and they are not aware of any production issues with the clay - call them at 800-345-5789 and see if they can help...