I just received a refractometer I ordered online. It says to calibrate with distilled water, so I did that. Then I tested it with some 1.026 calibration fluid that I have (bought with another refractometer from a different vendor that had spots in the prism and I sent back). I thought it should read 1.026, but it reads 1.028. Both samples were at 68 degrees. Did anyone have a similar experience? Do you think it's a bad refractometer, or bad calibration fluid? Maybe it's close enough so I shouldn't worry? By the way, my hydrometer reads .002 lower than the refractometer, I have heard this is common. Thanks for your input.