If you're the original owner, you'd have a shot if the rear main were
leaking, but my experience is that a leaking rear main rarely gets all the
way around to the other side of the flywheel and gets onto the clutch. I
have seen leaking input shaft seals do it.
The thing that really makes me happy is that seal and gasket leakage on
Hyundai is mostly a thing of the past. Back in the day, these things were
leak machines. I'd be afraid of replacing a timing belt without replacing
all the cam, crank, and any other front engine seals for fear that even if
they weren't leaking, they'd likely leak soon and damage the new belt.
Now, I hardly ever replace these seals, and I hardly ever see one leak