Pigma Micron thin line pens
I have 3 packages of these micron pens that I kept stored in my sewing room. My problem...not a one of them works now, when they had before and afraid they went unused for too long evenly though they have all been tightly capped. Does anyone know if there is a way to bring them back to life. Not an inexpensive item so I would surely appreciate any advice to salvage them.