You can use other, better tools later, but pens are always a great first tool. If you’re not encumbered by an uncomfortable grip, ink that skips, or a scratchy, draggy contact point, your ideas ...

Fellow Redditors jumped in with various cleaning hacks, including one peculiar suggestion – soaking the trousers in milk. Someone suggested: "If it's pen ink, I had milk work once to soak some out." ...