Viv? Do you have him in a glass vivarium? You really shouldn't have free standing water in the bottom of his enclosure, this can lead to serious issues, such as URI from the stagnant air, and he really should drink from the water in the bottom that could be contaminated from decal matter, dead feeders, etc.. Cup feeding maybe stressing him out if your holding the cup up to him. If he is in a glass vivarium, you should highly consider a screen enclosure, if you have a screen enclosure, you should highly consider drainage, there shouldn't be standing water in the bottom. This would allow you to free range feed the guy without issues. On another note, something we have had luck with in the past on a few picky eaters, is taking a plastic bowl or Tupperware container large enough to contain the crickets to where they can not jump out and placing it at the bottom of the cage just under the plant (we use hibiscus) or just under the foliage, and dropping a branch or vine down to access. We pretty much just consider this a hybrid cup feeding, alluring the chameleon to go to his food at the bottom and yet still containing the feeders to allow for an accounting of his intake.