I empty, wash, and refill my hummer feeders every-other day. I do see them visiting most of the plants that I have gone to the trouble of installing in the landscape for them, but hardly anything is blooming yet. My 2 feeders are being used heavily since I put them back up 2 weeks ago. I didn't buy anything but the feeders, and from there one just needs sugar and water to keep it full. Just takes a minute while I'm in the kitchen anyway, making coffee.
After using cheap plastic ones for so many years, I splurged last year and got beautiful glass ones. Not only are they so much more pretty, they stay clear and shiny. The feeder parts are plastic, but the globes are glass. Worth a few extra $$'s, to me.
