My last few all-grain batches have been under the expected OG at least as far as the recipe is concerned. The beers still taste good and all, but I'd like to get my efficiency up.
For example, my last one I really undershot. The recipe looks like it should have been in the 1.070 range, but I only got 1.050.
I'm doing single infusion & batch sparge for my mash.
I am hitting my mash temperatures pretty well (though I want to continue improving this).
What can I look into to get my efficiency up? Where am I losing sugar?