Now that got your attention. I always have a problem going down after I've been dry for a while. Figured I'd try a solution to clean out ears. Use it for a week or so before I go away in April.... Trolled a few old threads and found the perfect thread posted be TSnM on another board. (It's the essay that linked to another board)
Adam, this is unfortunately a common problem in new divers. As you descend and are unable to equalize, a relative vacuum occurs in your middle ear. This pressure differential draws fluid out of the capillaries (or even ruptures them) and the result is a fluid-filled middle ear. This dampens sound transduction and results in muffled hearing, and often in crackling or bubbling sounds. It can take a couple of weeks for this to resolve, depending on your anatomy and whether there is actually blood in the middle ear.
But the more worrisome thing is that it is also possible to damage the delicate structures of the inner ear with barotrauma, and when muffled hearing persists for more than a week or so, this is more concerning. I would strongly second the recommendation to see a diving-savvy ENT doc when you get home, and if you don't know where to find one, Divers Alert Network (DAN) can help (even if you aren't a member).
In the meantime, you might enjoy watching Dr. Kay's VIDEO on the diver's ear (warning, it is long) and reading a small ESSAY on this subject that I wrote a while back.