In order to create a fully automatic electric coffee maker, at least comprising a housing (1) having a water tank (12), a water pump, a brewing unit (2), controls, an electrical controller (3), and a collecting container (4) for coffee remains (5) or used coffee grounds, possibly having a bean container (6) and a grinding assembly (7), wherein the formation of mildew is substantially or completely prevented, the fully automatic electric coffee maker being cheap and easy to produce and having a long operating life, at least one UV light source (8, 11, 13, 14, 15) is arranged on the housing (1) or inside the housing (1) in such a way that the parts of the fully automatic coffee machine in contact with used coffee grounds or coffee remains (5) and/or the coffee remains (5) or the used coffee grounds and/or the bean container (6) and/or the grinding assembly (7) and/or the water tank (12) and/or a connecting line between the water tank (12) and the water pump or the brewing unit (2) is or can be irradiated with ultraviolet light beams.