Othello's new bad habit [View all]

I noticed something new about Othello. He has been licking off his belly fur. I play with him he has a schedule
and nothing has changed in my apartment.

I tried out putting a little coconut oil on the spot cause it may have been dry skin.

I am at a loss at what to do about it.

Should I get some icky tasty spray for cats next? Would that maybe break his habit?