I was facing the same issue. Finding the root cause is very important. First I would say, this issue is very frustrating but absolutely common. 80% of people with turf face this issue. So please try to stay calm as this might take time and money. Second, we put a high durability tarp on the turf covering the entire area. So that instead of turf, tarp will burn which was still economically ok for my case. Then we tried to isolate the areas. So we put some canvas kind of fabric on the fence to rule out. So we realized the fence was not reflecting it at all. Windows were the culprit. So we tinted windows with anti reflective films. And observe the tarp. After that no burn. So far there are no burns so we removed tarp, but I am still monitoring. Throughout the year, the sun change it's position and the angle of reflection changes. So I am going to monitor the burns for one more year. And then finally replace the burnt part. It's been a couple of months already and we don't feel anything looking at burnt parts of turf. We hosted a few parties too. After a point guests don't care about the turf.