I'm a trumpet player and teacher -
The other day, one of my students was oiling her valves - she's in 5th grade - and she oiled the springs - not the valve.
I asked her where she learned that (it certainly wasn't from me), and she said her first teacher (a local HS student) told her to oil that way.
Is this actually something people do and learn? I've seen people occasionally do this, but I don't see how it would help anything.
Should I start oiling the valve springs as well as the valve?