The invention relates to a device (10) for cleaning a window (18), particularly a motor vehicle window (18) which is at least partially covered with frost and/or grime. The inventive device is of the type that comprises: at least one windscreen wiper mechanism; a first cleaning circuit (20) which is used to spray a first liquid onto the window (18); a tank (22) for the first liquid; first means (36) for pressurising the first liquid; and at least one first device (34) for spraying the first liquid onto the window (18). Moreover, said device is of the type in which the first tank (22), pressurising means (36) and spray device (34) are all interconnected. The inventive device is characterised in that it comprises at least one second cleaning circuit (50) which is used to spray a second liquid onto the window (18), the nature and/or composition and/or physical characteristics of said second liquid being different from those of the first product.
