Yesterday on my pics I noticed a big blob of black, and in the view finder, 3 black specks in the upper right hand corner.

So today dh ran out and bought me the Arctic Butterfly, and it got rid of the black blob, but now i'm thinking that the 3 specks I see aren't on my sensor but on my mirror..

Is there anything I can do at home to get rid of it? Ugh! I don't think it's showing up on my pics but it's bugging me 'cause everytime I look through my viewfinder, there they are..
Thanks for any help..