I have stout fermenting and it has been in my carboy for a little over a week. Yesterday I opened the carboy to make a small intial addition of coffee beans and cacao nibs. Well when I opened it and smelled the brew, I got a strange almost plastic or rubber smell coming up from it.
Is this due to how young it is?
Should I worry about it?
I did everything down to the last detail so I cannot imagine it is contaminated. I hope the smell goes away.