I am going to quote my source here. I hope it is okay to reference a grower on another forum. I won't mention the specific forum, that might be better.

I have been following this guy Doc Bud for a while. I am real interested in his High Brix grows.
He is the one who came up with the lemon juice baking soda wash, along with the hot then cold water.

I now have to read though a shit ton of material again to find the "why" for using this stuff. I am doing this now and I will post here as soon as I can.

Brb...