I have had very little luck with our feeders this year. I bought an oriole feeder as well, because I saw an oriole on our deck rail late last summer and again early this spring. BUT...we also had/have a thief with a sweet tooth! A raccoon! It seems this is not an unusual occurrence in spring or when other food sources are scarce, and it has been very hot and dry here. I took down all but the one hummingbird feeder by the front porch, tried putting only a 1/4 cup in a day, and finally, after finding it on the ground one too many mornings, just gave up.
I love hummingbirds, but raccoons near my house--uh uh!!