u/Outrageous-Act2978

Hello fellow men of culture, just bought a 970 turbo Yachting edition. Very happy with it but im having some issues with my rearview window wiper. Sometimes it doesnt activate when it rains and sometimes it activates when its not raining. Has ayone experienced it before? I know you can set the sensitivity but is there a way to set it to manual operation? Would appreciate any help