

Foam disintegrated
I have an old Clydesdale case for my keyboard that I'm trying to resurrect. The foam padding turned into a weird, simultaneously oily and crumbly burden. It's very messy and smells horrible. Google says that the foam of today doesn't do this, but back in the day, old foam wasn't stable and used to do this after a long time, but doesn't offer any solutions on how to clean it up. Here are two photos of the foam. It also somehow took some impressions of my keyboard and power cable. I've managed to scrape off half of it, but cleaning it all up is very difficult because of how very sticky it is. Does anybody have any experience doing this?
Edit: spelling.