For me I only taste it for a few puffs and then the taste goes away. If you taste it longer than that, you may have rolled it too tight before threading it through your coil.
In my experiences, if you roll it too tight the cotton taste does not go away. I roll my cotton bacon VERY lightly, and then only twist the end to get it started going through the coil. I do not twist the main part of it at all.
I hope that helps.