From what I can tell is find a guide to dissemble your printer.
It might be messy but not shore if it is possible to wash them out and then dry them? (Just an idea as I have never done this before but was wandering it myself when I was cleaning my printhead and if they possibly need replacing anyways could be worth trying)
If it is anything like mine they come in a plastic holder and is full of a felt like material on both sides of the print heads track and also a couple smaller ones under the print head park position.
Don't know if this link is of any help