The steamer overflows 12 March 2020 11:52 - There is too much water in the base. Make sure you keep to the limit of 1.5 litres. - Some types of foods yield a great deal of liquid during cooking. - When certain types of fish are cooked, they cause the water to foam. Related articles How should I clean the basket? How should I clean the steamer base? When I fit the clear bowl, I find it impossible to switch to the FOOD PROCESSOR programme.