I ran across the Lifehacks question How do I get rid of feet blisters? and thought it was odd that it was closed. One reason given is there is simply nothing about this question that needs "thinking outside the box."
I disagree that this is not a "think outside the box" type question. It should be worth considering that maybe if no one immediately sees how a question can be handled by a "Life Hack" then they are the ones not thinking outside the box.
When I first heard the answer given by the OP (leave the thread in) from a soldier in the infantry in Afghanistan, I was amazed that I had never heard it before. This solution is exactly how the foot soldier keeps going, mile-after-mile, day-after-day, after having serious foot blisters. It was solved with the simplest of tools and no need for professional attention. It was described to be so effective that it was as if the blister was no longer there.
Who would not be interested in knowing something that simple but so contradictory to common understanding?
It's this non-obvious type of answer that seems to be the perfect response to a Lifehack type question as outlined in A Lifehacks Manifesto.