I am getting a strong chemical taste from TFA RY4 Double mixed at 10% and steeped for a month - no caramel taste, no vanilla. Did I mix too high, or should I try the open cap thing?
I do mine at 8% with about 0.5% of AP. I make it for several people, and they all love it - try at 8, maybe? I've never had to leave the cap off, and I put it in the crockpot at 150 for 4 hours to fast steep it (it needs that imo to be ready in a few days - but you've already left it to steep, so that shoudn't make a difference).