After almost two weeks, the two cups I'd put in weren't used up. That's too long to let sugar-water sit without changing and cleaning, so I'm going back to one cup at a time, and more frequent re-fills.
Whatever happened to empty the feeder so fast, last month, hasn't happened again.
Oh, well: I'm still seeing hummingbirds out there.
- "Hummingbird Feeder's Filled, Webcam's Still Offline"
(September 2, 2009)