Glow fuel, if kept in a well sealed container, lasts for many, many years. If kept in a poorly sealed container that 'breathes' with changes in atmospheric pressure and temperature, the fuel may become ruined by water absorption in months or weeks.

I would 'borrow' a tank of fuel from someone at the field and see if that helps. Your fuel may be OK - don't throw it out yet.

I had a bad experience with my Magnum 46XLS. Hopefully you have a better engine than I had.