How do I prevent my sugar coating from melting on my gummy bears

It is probably worth providing a recipe for what you're doing, but what about rolling them in a mix if iceing sugar and cornflour

you just have to decrease the moisture content in your gummy bears recipe. the gummy bears must not be much sticky when they come out of the mould.

Thanks.

You may need more gelatin in your recipe (or less water). You can also try a hair dryer to dry them completely.