The invention relates to a device for removing dirt, in particular oil, extreme dirt, etc. on a surface, in particular on a road pavement, wherein the device is integrated into a vehicle or associated with the vehicle, comprising nozzles (5, 9) for spraying cleaning liquid onto the area, brushes (3, 12) for mechanically treating the soiled area, and a suction apparatus (6) for suctioning the emulsion containing the removed dirt. Said device is designed and further developed in such a way that the cleaning liquid can be heated using the waste heat of the vehicle by means of a heat exchanger (2) in order to achieve a low use of cleaning liquid and a mode of operation that is gentle to surfaces and at the same time the least possible energy requirement.