Good questions - what cotton exactly are you using?
I am hooked on the Shiseido pads. Got them when Koh Gen Do wasn't available, and since it's like a lifetime supply and I'm happy, I stopped looking. There's perhaps a LITTLE bit of a taste - more like a slight lack of juice-flavor - for perhaps 3 hits after wicking. Then it seems to run pretty pure flavor for a pretty long while. I re-wick fairly often, just cuz it's easy - usually after accidentally running it a bit dry and getting a hint of a burn. When I pull the wick, it's not BURNT, but I just figure if I got there, then SOME burnt flavor might remain, so I re-wick it.
Also, if you're nasty taste is "burnt" then it could well be over-stuffed...
Also also - with the Shiseido or KGD type cotton, at least, no boiling. I get the idea, but I don't think I'd want to work with boiled cotton...
And finally - what were you using before?