Crested gecko won't eat

[rottingtrain]

I have had a crested gecko for about half a year and he has not eaten his cgd on his own once since i got him.
every night I have to hand feed him drops of it from my finger. I have tried a few different brands of food, but he won't eat any of them. I need help quickly because I am leaving for vacation and no pet sitters will take him with his current eating habits.