The goal of this cluster based intervention trial is to evaluate the effect of a nurse-led patient education program on dry mouth in patients with a life-limiting condition or frailty. The Mouth Educational Program (MEP) is a nurse-led patient education program, in which trained nurses use current clinical, palliative dry mouth guidelines in a structured manner to discuss causes, consequences and interventions with the patients and to create an appropriate treatment plan. This intervention will be compared to a control group receiving care as usual. Therefore, the main question it aims to answer is: Does a nurse-led patient education program reduce dry mouth complaints in patients with a life-limiting condition or frailty? Participants will be asked to answer questionnaires and, when part of the intervention group, partake in the Mouth Educational Program (MEP).