Use only defrosted food for the food steamer.
Yes, this is possible, when strong, dominating food, such as herbs are steamed.
You can clean the plastic materials by a little damp cloth. Clean them with a dry towel. Never immerse the base and plug in water in case of electric shock.
Various kind of food like potatoes, vegetables, fish, meat.
Use the rice bowl for making rice (except for the VS-3915).