I made the Imperial Pilsner as per the recipe in Sam's book Extreme Brewing. Although I've kept it at 45F for a couple months now (I orginally brewed in on 8/2/09) it seems to have stalled at 1026. I've checked it a couple times over the past 2 weeks with Fisher NIST calibrated hydrometers at 60F as per the calibration and so that's not the issue. This was my first lager and although it tastes ok, you can tell it's not quite ready yet. Any suggestions? The FG is called for 1016 and I was dead balls on at 1088 for my OG (recipe called for 1089).