So, this may be a silly/gross question... but when I try to clean the Nosefrida, I can never get all the "stuff" that accumulates just inside the tip! None of the cleaning tools I have can reach down that far from the big open end and nothing is small enough to go inside the tip from the small end. (Hope this is making sense!) No matter how much water I run through it, the gunk just won't wash out.

How do you clean yours?!