Activate the wiper service position via settings in the centre display. This gives you better access to the front wiper blades.
Rinse the area with water to get rid of any loose dust and dirt.
Use a soft sponge with a lukewarm soap solution or car shampoo to clean the area. Lift the wiper arms from the windscreen for better access.
Use a clean, soft cloth to dry the wipers.
Make sure the wiper arms are folded back down against the windscreen, and then deactivate the wiper service position.
Important
Test the wipers before driving. Use plenty of washer fluid when the wipers are in motion. The windscreen must be wet for the wipers to work properly.