There is a way of cleaning up used yeast or washing/rinsing out the spurge material. It is a series of steps that involve diluting the yeast sludge with sterile water and pouring off the foreign debris that rises to the top and that settles to the bottom of the mixture. The middle area of the rinsed solution contains the healthy, viable yeast cells.
In any case, here are the steps to washing your yeast:
Pour off the excess liquid from the top of the container of salvaged yeast
Fill the container with sterile water (in my case I boil and cooled filtered water)
Agitate the jar until completely mixed, don't leave any lumps intact.
Let mixture rest until there is a clear separation of the three layers (you should be able to see a lighter layer in the middle, that is formed by the healthy yeast)
A clear seperation of the three areas, the light middle area is the healthy yeast and you can see it congregating at the bottom (light area)
This is a look after a second seperation is complete.
With the yeast now in a new container repeat the process to clean even further. Repeat as many times as you wish.
After a third repeat filling with sterile water and agitating
This is the final result.
Pretty clear liquid covering a healthy yeast cake
You can store the yeast longer under these conditions making it easy to step up a culture from washed yeast to create a very large and healthy colony
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