First of all, baby food isn't good. It doesn't have all the nutrients your crestie needs, and can be addictive. Are you offering Repashy Crested Gecko Diet at all? They should be fed the Repashy CGD almost exclusively. CGD and the occasional (once a week at most) cricket treat.
Second, it doesn't need to be hand-fed. Like any other reptile, crested geckos hatch out completely independent and able to fend for themselves. They're smart enough to find their food dish and eat on their own. Just keep a small dish of CGD in the enclosure at all times.
Since it appears you're taking advice from Petco, I
highly recommend double-checking all your husbandry. Last time I was in Petco, they were recommending Crested Geckos be kept at 80 degrees with basking temps in the 90s... Those temps can quite literally kill a Crestie.
http://www.forums.repashy.com/ is a great forum for Cresties and other Rhacodactylus geckos. You can find a Crested Gecko
care sheet in the Care Sheets forum under Articles.
Good luck!