Crumbly FIMO

[lower-class.livejournal.com]

I decided to use my FIMO the other day and make beads. When I unwrapped it, it was tough and crumbly. I had 2 regular colors and some stuff with glitterin it. The stuff with glitter in it was crumbly and the other stuff was fine. It was okay to use once I worked with it for a long time, it became usable. Mind you it was still very tough and hard to make beads out of.
The beads turned out fine I guess. When I worked with the Sculpty, it was softer and easier to work with. It did not crumble to pieces when I touched it.
My question is, is FIMO suppose to be crumbly? I have never usedit before, so I do not know. Or did I just get a bad batch of it?
But I am talking about 7 colors of FIMO that were crumbly.
Is there anything I can do to make it not so crumbly.