Hummingbirds???????

OK, if Jag can ask for gun advice, then I'm going to ask for bird advice. Yesterday I got a hummingbird feeder, but it didn't have any directions with it. I wanted to make my own "nectar" rather than buy the expensive stuff they sell in stores. Is it 3 parts water to one part sugar, or is it 4 to 1? Do I have to boil the mixture? What about that gunky red dye? Do I have to put that in? I suppose I could try looking this up on Google, but I'd like to hear from someone who's actually had experience feeding hummers. Thanks!