I would have expected FG to be closer to about 1.012, so I'm a little surprised it's still falling. I figure it's got to be finished over the next day or two. I hate to say, and hope this is not true, but is it possible it became contaminated? Or did you by chance mash for a very long time? I'd be curious to see the recipe, including mash schedule.
I don't think it is contaminated. My cleaning and sanitation procedures border paranoia, but I suppose anything is possible.
10# Thomas Fawcett Maris Otter
.5# Bairds Crystal 50/60
.5# Bairds Carastan
1 oz East Kent Goldings at 60 min
1 oz East Kent Goldings at 30 min
1 oz Bramling Cross at 10 min
1 oz Bramling Cross in whirlpool at 165 degrees for 15 min
1/2 teaspoon Wyeast nutrient at 10 minutes
1 pack Wyeast 1469, no starter, smacked the pack at the start of the process and left at room temperature until pitching
I mashed with 5 gallons of water for 60 minutes at 152, but it dropped to 147 by the end. I batch sparged with 4 gallons at 170 for 20 minutes. I collected about 6.5 gallons of wort pre-boil. Boiled for 60 minutes. I was left with 4.5 gallons post boil. Before pitching, I hit the wort with O2 with an aeration stone for about 30 seconds.