[ChUcK]

There are tons of variables that most dyers don't take into account when dispensing advice, myself included. The rules of the game are not the same from kitchen to kitchen. I doubt anybody knows what effects are to be had from ancillary factors like humidity, exact dye formula, rinse water softness, procedural inconsistencies, etc.

I think the best advice I can give is to continue experimenting until you find what works for you. If you're really meant to dye discs then you'll find a comfort zone of variables soon enough.