On a whim I Googled 'Clogged Niji Waterbrush' and I found this site:
I followed the procedure and it fixed both of my brushes. I did three things that were a little different from the instructions:
4. Where it says to use a q-tip to clean inside of sleeve, I brushed mine with a wet old tooth brush and then applied the q-tip.
7. Mine didn't look dirty and so I left that part alone.
8. For the brush tip, I wet it a little so all of the nylon bristles would adhere to one another, gently squeezed them together and then the rest was a cake walk.
Both pens are working like new. What a find.......and I did it all with Google!!! When searches don't work I change the words or position of the words and it works for me always! Gotta love that Google.
Thanks for stopping by to look and share all!!