After 6 months of whispere’s exposed to sun, the protective layer of screen is started yo be deteriorated, losing the transparency property and protection to UV, meaning is catching up less sun.
Answer from Netro support after several exchanges had not been at the right level, despite that last topic was really well addressed.
“Thanks for your info and it should not affect the normal use of the sensor. Please let us know if you see any further issues during use.“
Check pictures and make your statement, but I am not convince about quality of manufacturing of the whispered elements.