#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
"Peeling an orange doesn’t have to be hard and messy. If you cut the top and bottom off and then make a cut on its side, it will unroll in a nice line of orange segments."
#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?