Starter, oh bother!
I used most of my rye starter the other day. As I often do, I left it on the counter and forgot about it. When I looked at it, it was so sad. Scummy stuff on top. Yuk. I put as much as I could into another container and put 50/50+ flour/water (remember I'm at over 6K altitude). Cross your fingers that I can revive it.