I have been brewing the same beer now several times (gallon batches in a two 10 gallon igloo system) trying to get my system and technique dialed in but can't seem to get the efficiency I want out of my system, Beersmith is measuring it at 52%. The last batch I did we were meticulous about all of our steps and temperatures. We increased hot liqueur temperature from 168F to 170F and made sure to do a good long sparge (we are fly spargeing). Gravity about 3/4 of the way through the sparge was 1.066, target preboil was 1.047, and ended up with a preboil of 1.034. I can't figure out what is going wrong and how the gravity could drop so low so quickly. The one thing I did note was that the mash temp after the 1hr rest was down to 144F (strike temp was 162F and it was exactly 152F when the lid went on. I've never taken the temp after the rest. The end result was a OG of 1.042, the estimated OG was 1.057.
Any thoughts on what I'm missing here?
Any thoughts on what I'm missing here?