I also use kaowool just because I have plenty of it, and I've found it to work fast; I even use the vacumm with it at times!
When its clogged, mainly with gold, I place it on a small beaker and add HCl and some clorox. I'll add it to the main solution, this way I collect as much of the gold the first time around, especially if I'm refining for others.
I guess with the charmin plug I would have to set aside, incinerate, and then process the ashes later...
But, I will be doing the charmin plug some day, in order to have that expirience. 8)
Thank you all!
Phil