I’ve been trying to recollect yeast from each batch I do, just to have an ‘on the fly’ yeast library.
The washing part if pretty simple really, and I’m not having any issues there. However, most posts I read say that a washed strain of yeast has about 10 uses before you need to re-buy or once it ‘turns peanut butter color’ you should re-buy.
Where I’m confused is that if you are consistently using the same yeast with the same beer, or similar beer and re-collecting, shouldn’t the yeast get better not worse?
I can understand why, particularly if you were alternating the types of beer you were using it on, it would lose the original character, but if you’re using it on the same beer the same way every time it seems like with that many generations the yeast would become more acclimated to making the beer you want, not less?
Am I missing something?