it's a bit pain to scrape it off
I think I used a fork doing it and it ended up in 100 little pieces because I'm so clumsy
so this is what you need to do: scrape the silicone from the things I circled with black, once you do that just pull the driver from the big plastic paper whatever circle(filter). it was rreally hard to do at first I admit but now it's super easy and I can do the disassembly thing in one minute. the easiest way is to press your finger against the center of the filter with your left hand and detach the driver with your right hand
http://i.imgur.com/cLgak2q.jpg