#24 While using oil in a lock would work, the oil will collect crud and dry out over time. The proper thing to use for locks is graphite lubricant. Arbitrary example from Amazon: https://www.amazon.com/Panef-Corp-Powdered-Graphite-Lubricant/dp/B0016GZQ60
"Most people peel their banana from the top part, which is wrong. The best way to peel a banana is from the bottom, so you don’t squeeze the fruit. In fact, monkeys apparently figured this out a long time ago."
#24 While using oil in a lock would work, the oil will collect crud and dry out over time. The proper thing to use for locks is graphite lubricant. Arbitrary example from Amazon: https://www.amazon.com/Panef-Corp-Powdered-Graphite-Lubricant/dp/B0016GZQ60
https://www.amazon.com/Panef-Corp-Powdered-Graphite-Lubricant/dp/B0016GZQ60
Now I don't use hairpins but I would think the side WITHOUT the sharp pointed end would be better against your scalp?