As a guide to cook 1 cup of rice (serves 2 small or 1 large portion) use 1 measuring cup of white rice and then add one and a half measuring cup of water. With some types of rice it is normal for a little rice to stick on the base when cooking 1 cup of rice.
There is not enough or too much water compared to the quantity of rice being cooked, please refer to the cooking guide. Make sure that the rice is well distributed around the whole surface of the bowl in order to allow even cooking.
Yes you can, but remember not to overload the steaming basket as it is fairly shallow (ie not as deep as a steaming basket) and there needs to be some space for steam to circulate around the food. Also remember that you might not want raw meat/fish juices going into the rice as it is cooked although this will add some flavour - you may want to cook meat or fish on greaseproof paper in the steamer. Vegetables will be fine.
Yes, they are dishwasher safe. But be careful not to damage the inside coating on the dishwasher racks when you put the elements into the machine. After having washed them several times in the dishwasher, it is recommended to wipe the whole of the inner surface of the bowl with a little oil.
The colour of the bowl surface may change after using for the first time or after a long period of use. Its change in colour is due to the action of steam and water and does not have any effect on the use of the Rice Cooker nor is it dangerous for your health. It is safe to continue using.