However, she found an alternative, as recounted here:
I was digging through my bag trying to find the oil and lo and behold, what should I stumble across but a little packet of personal lubricant that the university women's center give away, which I'd grabbed as a funny.
*looks at the trombone*
*looks at the packet*
*looks at the trombone again*
I am not kidding when I say that this is the slickest my slide has ever been. no joke.