How to pull out stuborn Fuel Injectors

I'm working on a 3.1 V6 and I'm having a hard time with the fuel injectors. I couldn't get them to pull out with the fuel rail attached so I removed the clips and pulled out the rail. Now I'm having a hard time removing the injectors. I finally mananged to get two of them out but the last four are in there solid. I don't want to use a pry bar on them but I can't seem to get them out by hand. Does anyone have any tips on getting the stubborn things out?