So, my laptop's fan stopped running. Before, all it needed was a little blast of compressed air to get it going, but that wasn't doing it, so I bought one of those thingies that goes underneath a laptop to blow air into it as a temporary solution. Called HP up, got a new fan the next day (yeah, they're very good about shipping things to you), and took my laptop apart. Well, this is what I found stuck in the heatsink...
Grossss (and definitely my bad for not cleaning it earlier)