Mine have the same cracks. I hired a Craigslist headlight restoration guy. He's retired. He started on my current set of headlights. He stopped after two minutes. He said the lens have a clear coat on them. It would take hours to remove the clear. I paid him for his travel distance and time. I'll be replacing the current set with unrestored units. I'll polish the replacement set before installation.

Or do OEM lens crack like the pic?

__________________
'06 X5 3.0i - bought @143,123 miles (12/26/20)