Welcome aboard ngc and to the other new members above
Don't get too hung up on efficiency. For a start there are several different types of efficiency such as efficiency into kettle, mash efficiency, extract efficiency, post-boil efficiency, efficiency into fermentor, brewhouse efficiency... the list goes on and on. To make the problem worse, some of these terms mean totally different things when used by different brewers.
So when one brewer says, "I got 65%," and another says, "I got 85%," often their brews are exactly the same

. They are simply not talking the same language. The word, "efficiency," on its own, is pretty much a useless term unfortunately

.
The most useful efficiency term is, "Efficiency into Kettle". It is the first point in a brew where a brewer can measure efficiency and it is the only common ground we brewers have.
Search on here the term "Efficiency into Kettle" and you will have heaps to read. It's a confusing subject so don't be worried about asking questions or starting new threads on it. You will get answers that make sense.
After reading the above, if you still think you have an 'efficiency' problem, have a read of
this efficiency checklist.
PP
[Edit: Good link Josh

]
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