Dust has been collecting in my Blackstone's 3.5mm port and I don't really use the port. So I've been wondering if there's some sort of rubber piece that I could buy to fill the whole up to prevent more dust from accumulating?
I've found this post but that turned up dead links on Ebay. However, other searches have led me to i-Close but it's not in English and I'm not sure if they even ship internationally.
Any help would be appreciated.