Hey Jelleyfish! If you're growing indoors you might not have a reason to wash your buds. I don't know, I've never flowered female plants indoors. I do grow in greenhouses year round (can do in Hawaii) and I wash all my plants post harvest. I just use 3 buckets or 3 clean dedicated trashcans (depending on plant size) of pure water. All sorts of dust, weed seeds, bugs and/or bug stuff and spray residue comes off in the first bucket, less in the second bucket and by the time I get to the third bucket the water stays clean. I do 10 dunks with some agitation in each can/bucket and the buds come out sparkling clean. I'll do post harvest washing for the rest of my life.
I spray pretty far into flowering too though. Mostly kelp and fulvic acid so it's more important for me to do than others probably.
Also, I scoped the buds the first couple times I tried it and I couldn't see a difference as far as tricome preservation. I suppose you could lose some trichs if you were really rough with the buds. I give them some good dunking, but I'm not going nuts with speed or force. I also give them a smooth pendulum type swing when they're done to get most of the water out.
You could give it a try on a few branches and see how you like it. Scope them before and after and see if you notice a difference. I doubt you will. I think fresh tricomes are stuck on pretty sturdily.
And finally, another advantage is that I believe it slows down the drying a little more which I like.
I also follow this process and will never divert. If some people think the trichomes will fall off, all I ask is try it on 1 bud to see the outcome.
Ill add that I do use some fresh lemon juice as a natural cleanser in 1 bucket of mine
Cheers