u/noeyedeer8

I've been playing trumpet for a few years now (8?) and I've always struggled with my range, recently I've found it isn't that I'm not putting "enough air" or not practicing enough, but my buzz just tops out at a C and then cuts out almost entirely. I can play the notes above C (sometimes haha) for a split second, but I then feel my lips stop buzzing. (well sometimes life will be good to me, and I don't have those issues but most days my range tops out at the C above the staff)

I know it's technically the same buzzing as down low, but I have no clue how to "fix" this issue or what to work on to keep my lips buzzing up there

Any help? Any tips are appreciated.