I've never had any luck with hummingbird feeders. I've tried the fancy-schmancy kind, glass and copper, and the $5 cheapies - recommended by my mother-in-law, the hummingbird queen. What does draw them, however is Monarda. They love the stuff, and who can blame them? Big, intensely red blooms, no maintenance, long bloom season.
There's only one species of hummingbird in Maine, the Ruby-throated, which makes this one a little lady, since she is greenish-gray all over.