Yes I confirmed the driver still works with a sine sweep so it's was more an issue of getting it to as close as peak performance as possible.

Thank you for the advice

I've seen people who disassembled the electret driver. Do you think it's worth it to remove dust and corrosion or just deal with it since the electret will diminish over time?

So I just got these headphones and decided to look at the driver and the electret looks like it was kept in a swamp. Is there any hope of restoring this?

Edit: would ultra sonication work? Like those fancy cleaners for record players

Edit: corrected driver type.