Flushing.
The NYD got a 2 week flush because it was a) older b) fading earlier c) foxtailing
The cookies had a flush that brought the EC down to about 1.0-1.3.
Then a dry down and after two days it looked like it was ready for chopping but I wanted to bring the flush runoff down even more. So I flushed again with about 30 litres of filtered water and brought the runoff down to just under 0.5.
Now a dry down for another 2-3 days in darkness and then the chop!