That's a perfect description and how I do it. Gently back and forth, rest, back and forth... till my arms hurt cause I got a lotta weed to wash.
Someone should go into a dispensary and ask where the "washed" buds are! Good luck and report back.
Like this:
"a friend of mine said you all have washed buds...can you show me the washed flowers please?"
Warning... canna science at work..... Me likey.... Plus the flater shaped container holds less volume of liquid so same coverage with less input... "less is more", wins again!
I bud wash in containers made to fit under your bed (bad feng shui BTW - storing stuff under your bed), so good re-purpose of those large flat containers.
Eye Eye Cappy Zigg-master. FTMFW! Boom
I told my go to guy hey your boy cleans washes his bud tight since green house ?
He looked at me like I was nuts lol