You need to dust very lightly no mater what schedule you end up using. This may be why your dusted feeders are being rejected.
This is the basic schedule.
"Feeder insects should be lightly dusted with powdered supplement before being fed to your chameleon. As a montane species (native to higher altitudes) Jackson's have decreased supplementation requirements compared to tropical species due to metabolism differences. Use calcium (without D3 or phosphorus) twice a week, a multivitamin once a month, and calcium with D3 once a month."
This is the basic schedule.
"Feeder insects should be lightly dusted with powdered supplement before being fed to your chameleon. As a montane species (native to higher altitudes) Jackson's have decreased supplementation requirements compared to tropical species due to metabolism differences. Use calcium (without D3 or phosphorus) twice a week, a multivitamin once a month, and calcium with D3 once a month."