How do I cook rice in a steamer?
It is probably best if you pre-soak the rice before cooking. How long you soak it for will depend strongly on the type of rice and your ambient temperature. Try an hour to begin with. Thai glutinous rice is traditionally steamed rather than boiled. Use a porous container for the rice so that excess water or condensates could drain out and not make the rice soggy. As a hack, you can wrap the pre-soak rice in a towel and put the bundle in the steamer, just be prepared to lose a fair amount to the towel deal with the sticky mess on it afterwards.