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.

Steph