Abstract: Provided herein are a dishwasher and a method at a dishwasher for detecting opening of a washing agent dispenser lid. The dishwasher may include a dispenser accommodated in a dishwasher door and being arranged to dispose a washing agent in a compartment of the dishwasher at the opening of a dispenser lid. The dishwasher may further include at least one sensor arranged to detect a shock caused by the dispenser lid opening against the dishwasher door, and to communicate a signal in response thereto indicative of the dispenser lid opening; and may include a controller arranged to receive the signal and to determine an action to be taken on the basis of the received signal.