wet scans with medium format film

[TLM]

hi there,

i'm trying to do wet scans on my epson v700 of my medium format film and i am getting vertical banding. does anyone know how to resolve this issue?

i have cleaned the glass on top and bottom, tapped the edges of the scanner where the glass meets the plastic, put a few drops of the kami fluid mount, laid my clean negative down, applied a few more drops on top of the negative and laid the mylar down. it isn't the mylar because i rotated the mylar and rescanned. i believe there is something internal going on that is causing the vertical banding.

thanks!
tlm