Sorry. There's no hope. You should send it straight to me for proper disposal.
That would be a joke, I say, a joke, folks.
On a potentially more helpful note, has the gear noise changed since you got it, or has it always been as loud as it is now?
If it's getting louder, that indicates some sort of wear or slippage issue that's making the mechanism noisier.
Looking at it from the other side of the signal versus noise problem, has the voice and music changed volume since you got it? If the desireable sound has gotten quieter, then the undesired sound will seem louder by comparison.
I've never actually seen one of these in person, and so can't comment on what the expected level or whirring is. We do have a couple of active community members who have seen Elvis. They may have more specific advice to offer.
ScottE -- collecting and building robots for 40 years - details in profile