Why is feeding crickets a problem??? Just gradually introduce the mealworms into the geckos feeding time and it should soon get a taste for them. You can either keep them in a dish and leave in the tank, or if your gecko prefers.. takes them out of your hand! Having a cresty feed out of your hand is not a bad thing!!
With the babyfood, it could be the dish is in the 'wrong' place for the gecko. My gold dust day geckos were like that. Place it in different parts of the tank, and only move it again (apart from cleaning it) if its obviously being ignored. If you keep moving it around the tank, it will cause stress. But i don't think the gecko is stressed in the first place. He wouldn't eat anything.
Claire
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I currently keep:
1.2 Leopard Geckos - Eublepharis macularius
1.1 Gold Dust Day Geckos - Phelsuma laticauda
6 Dwarf Ground Geckos - Tropiocolotes tripolitanus
0.1 Chinese Cave Gecko - Goniurosaurus luii
0.1 Tokay Gecko - Gekko gecko
1.1 Mexican Banded Geckos - Coleonyx mitratus
1.0 Pictus Gecko - Paroedura pictus
Other species: Crested Gecko - Rhacodactylus ciliatus, Giant Day Gecko - Phelsuma m. grandis, Dwarf Ground Geckos - Tropiocolotes steudneri