Hey.. Ive just aquired a refractometer and calibrated it using distilled water. When I've checked my lager and pale ales that should be ready, both are showing SG of over 1.020. Checking with my hydrometer shows them at 1.008 and 1.012 respectively. Ive checked the hydrometer in room temp tap water, and it was reading 1.000. Is it safe to assume the refractometer is goosed, or can they be repaired at all? Thanks!