Whenever I hit my volumes my efficiency stinks. My last two batches were 54.35% and 61.95%. If I go over my volume and then do a boil off, I am then usually in the 80% range, which I consider acceptable.I have a 10 gallon round Igloo cooler with a stainless steel false bottom. My volumes are good, my temperatures are good, and I am using the Palmer method of batch sparging. I know that I can use BrewSmith to add some grain to my mash to compensate, but that just seems wasteful. So here's my question ... will going to a 90 minute mash, or doing decoction raise my efficiency 20%? Or should I just toss in the towel and go to fly sparging?