A dishwasher for treating dishes according to an automatic cycle of operation includes a tub with an access opening, at least one dish rack within the treating chamber and accessible through the access opening, a closure element moveable between a closed and opened position to selectively close and open the access opening, and a treating chemistry dispenser. The treating chemistry dispenser includes a housing defining a treating chemistry reservoir with a dispensing opening, a lid slidably mounted to the housing for sliding movement along a travel path between a closed and opened position to selectively open and close the treating chemistry reservoir, and a biasing element operably coupled to the lid and biasing the lid from the closed to the opened position.