Second-time brewer (to be).
When I did my first kit brew, I didn't want to mess anything up, and the instructions I was following told me to avoid the yeast sachet taped to the top of the LME can and get a reasonable, brand-name yeast that you can be confident is going to work well (it did); I got an 11g sachet of Safale S-04.
However, I only have a 11L carboy, so I only needed about half the sachet for my first brew. Next, I'm going to do a 9L brew, so I only need about the same amount of yeast again.
So, the question is -- does it make a difference at all if the yeast packet is opened? After I opened it, I folded it over and it's been sitting on my (cool) kitchen counter for the past 6 weeks (doh, I should have put it in the fridge, yes, I know).
Should I just pitch it in the trash, or pitch it in the beer?