So about 4 moths ago i read an article on HBT about yeast harvesting . Its not yeast washing but making a little bit bigger starter and saving the extra for later. 4 months later i brewed a batch using the extra "made a starter of course" and it worked like a charm. Full fermentation and a jar of extra ready to go for the next one. I have a British and a American 2 that I'm going to do the same with. Awesome stuff !
https://www.homebrewtalk.com/entries/yeast-harvesting-novel-approach.html
https://www.homebrewtalk.com/entries/yeast-harvesting-novel-approach.html