Yes indeed, my hooch makes me and some people that have had a good session on it crap! I used to add a little glycerin to smooth out the bourbon but after some research I discovered that glycerin can irritate a mucus gland in your ass so I swapped over to glucose only to find that it settles on the bottom of the bottle and dosnt look very good.
I now dont use anything to smooth the spirit and allow grandfather time to do a little smoothing but as my skills have improved a lot since I started and the final product gets better and better with every batch. I just do a plain Ol sugar wash.
I have an LM fractioning reflux still and I end up with 95% every time. I discard 150ml of foreshots per 20L of wash just to be sure. I collect the next 14% as heads and the last 14% as tails and I still carbon filter after that only because I have access to as much top quality carbon as I want for free.
There is no hint at all of nasties in my bourbon and the first two batches I made without using glycerin or glucos have still made people shit the next day....evil evil bowl spraying sessions
So what on earth could be causing this!??
The beginning of wisdom is to say "I don't know".