I have a Hampton Bay ceiling fan that used to wobble. I've adjusted the blades & fixed this problem but it still squeals now & then. Do the blades need further adjustment or do these need periodic oiling?

I do oil mine sometimes, but usually just the one outdoors. Is it really dry in your home?

You can try oiling:

Oiling your ceiling fan - Ceiling Fans N More

But you may have some other issues here, especially as it's a Hampton Bay. Anything rubbing?