From Tim in Kuna, ID: "What kind of nectar do you put in your feeder?"
I like to make my own. Here's my simple time-tested and Mother Nature approved recipe:
4 cups of water
1 cup of sugar
mix in a small pot on the stove
heat and stir constantly until the cloudy water clears up
let it cool and pour into a freshly cleaned hummingbird feeder
Experts warn against using any other types of sugar other than granular sugar from sugar cane or sugar beets. Don't use corn syrup or any other sweeteners. Food coloring is simply not necessary and some people think it may have harmful effects. A clean feeder is very important to prevent the spread of diseases.
I'm also testing out a fully recyclable feeder from The Humm sent to me from the Celebrate Urban Birds folks as a gift for hosting our event back in May. You can use an average plastic water battle. The bottle cap feeder and perch can be recycled after each use so you never have to clean anything and you can insure a clean feeder every time. Hummingbirds seem to like it just fine!