Black gunk spots under liner afterwards sweating?
I've recently gotten back to more intense exercise, including running on a blade, so I've been sweating more. No biggie, but I've been getting these little black pieces of gunk under my liner afterwards. They're almost hard like plastic. That wouldn't be an issue but they cling to my hair and pull it which can be painful. I also can't seem to get them out without accidentally pulling som hairs out which is like to avoid because of the risk of ingrown hairs. I'm working out in a clean liner so I'm not really sure where these are coming from. I asked my prosthetist and he said he hasn't seen them before.
Any advice on what these are and how to prevent them? To be clear, they're not attached to my actual skin at all, just the hairs.
(Tagged NSFW just because they're kind of gross)