Yes, I get it. I have a sensitive palate, it is why I mainly use a genesis for the "Cleanest taste".
Described here on UKV.
http://ukvapers.org/Thread-Starting-with-cotton
*Edit. Reading that thread I may try cotton again, maybe I was using too much?
*Re-edit. Though reading this thread, it seems I probably will still taste it.
http://www.vapersforum.com/showthread.php?46620-Cotton-What-s-your-take-on-it
It is like you say not a bad/burnt taste, just that I can taste the cotton. I get it with silica too, though that is worse for me. Horrible stuff.
I'm glad I'm not the only one. I have tons of silica and Ekowool, but like you I just can't stand the taste, it's the only reason I have moved onto cotton.
Have you tried boiling your cotton? I think I might give it a try, can't find anywhere local that sells distilled water though.