I feel like I did the most on my dry and cure last crop and it was harsh for 10 years I gave 2 light flushings trimmed and hung in the room for 5 days or so and literally put the bud in gallon bags and it was always good with good taste
Not done properly then!
YOU can not improve anything by final flushing!
https://www.rollitup.org/t/dr-who-is-right-rx-green-technologies-report.1005991/#post-15310397
I don't have the time to teach any Ag science class here.....
Some old hippie sat on a log and by logic. decided that it was nutrients left in the plant from his growing.
How to get rid of that? He wondered.
AH HA! I'll flush the bad stuff out by running a stupid amount of water through the media - thus "flushing" the bad stuff from the plant..
Sorry dude! It does NOT work that way for a plant. You can't "flush" anything from a plant that way!
You suffer from "confirmation bias" . Your brain is telling you there is a difference - Even when one does not exist..