I think my ink stained my pen. Can I use rubbing alcohol to remove it?
No! Rubbing alcohol can dissolve pen materials, or at the very least, fade and discolor it. It’s best to start with water, and if necessary, you can try some pen flush or an ultra sonicator, but water is the safest to work with. The more you know about the material of your pen, the better you can care for your pen. Ebonite pens should not be soaked in water, for example, neither should casein.