Hello everyone,
I also have the fogging issue on my rear light strip. After getting in touch with my dealer, I was directed to contact the Smart service center in Maia, Portugal to schedule the replacement.
Service Center Contact: Smart Portugal Service Center - Maia Location, Phone: 229 400 400
They will proceed with the replacement of the light strip. If you have the same issue, I recommend calling them to schedule your repair appointment.
best regards