Goulet Pen Flush worked really well. Usually filtered water (and when possible the bulb syringe we got from Goulet) has been sufficient, but, then a particular ink needed a long soak. I decided to buy Goulet Pen Flush with my next order. The pen flush worked like a charm when I wanted to clean several pens filled with particularly saturated inks.

I love Goulet Pen Flush. I've been using it for years. Sometimes I forget to clean out a pen and don't use it for a while. This stuff works so well at getting it clean!!

Best Flush/Economical

Recommend using this flush because it works on most fountain pen inks. It cleans out shimmer inks really well. The 8oz bottle size is very economical.