Originally Posted by DaSebsch
Put your oven at a relatively low temperature, place the coals on a baking sheet or something and just let them sit in there for a while.
Bpetruzzo had the exact temp. and time, you could shoot him a PM.
I think this is the thread you were talking about(http://www.hookahpro.com/forum/showthread.php?t=19797
As for the issues with the ashes, I don't have much experience with Exoticas but I still have this issue with coconut coals. I try and tap the ash from my coals in the tray but often some ash falls off before I can get it off the bowl so I try and blow it off so it doesn't go back into the bowl once I put the ashed coal back on and start to inhale again. Hope this helps.