Game Gear Question

I’m attempting my first re capping on my original Sega game gear. Had a question on the audio board. I’m noticing some leaking around L1 on the right, I want to replace it but it’s not labeled and I don’t know what the piece is. Could I just clean it? Thanks!

In the game gear maintance manual it is listed as line filter. If the three lines are intact, I would only clean it.

Thank you very much!