Won't Write Vp Nib Unit

[Mr Tutt]

I have two medium Pilot VP nib units that refuse to write. I've soaked them in water, and had them in the ultrasound bath, but to no avail. One unit, with a converter, won't take up ink; the other, with a cartridge won't write more than a few words before drying up. Any suggestion as to who might take a look at these. Thanks.

[farazqamar]

My guess is that the feeds are clogged. Try flossing the feed with a brass shim behind the nib slit. Also try rinsing the feeds with a very diluted amonia + a drop of dishwashing liquid.