Hi all! I'm new here. I am a sofware developer, started learning the flute almost three years ago at age of 47. I have a question, just out of curiosity. This ia a 6-month, almost new flute. It has already developed this inverted V-shape tarnish on the lip plate. Se same also happened on my previous flute. (I always brush my teeth before playing, and I always clean the flute inside and outside when I'm done) I tried to ask both my teacher and my technician, they both said it "can be normal", as we are all different, we all blow in defferent ways, etc. But does this happen to anybody else? Could it mean I am blowing in a "non-optimal" direction? Any other thoughts? Thank you!