I have a lot of old Firestar pyrogen that dried up. Used Acetone to thin it, but it just does not "bond" like it used to when I try to dip it. Very thin coating. Then trying to double-dip to get it thicker, the acetone often removes most or all the first dip layer. Also what does bond is too crumbly when it dries. Any ideas of something else I could add to make it bond better, not be crumbly, and yet not ruin the pyrogen's ability to ignite? I'm considering clear dope as a plasticizer, but wonder if others have come up with other ways to address this.