I think I damaged my thermal scope..

[CharlieGuy99]

As the title states, I think I have damaged my AGM Varmint LRF ts50-384.. I accidentally left the scope with the lens cover open on my work bench in the garage the other day and it sat facing east towards the window of the garage.. The scope was powered down but it seems to be burnt by the sun shining through the window. To make a long story short, I took it out last night and now I can’t barely see over 100 yards with the optic.. Before I could easily see well over 1000 meters. Has anyone shared this experience? Am I screwed? Should I try to file a warranty claim on it, or not even waste my time? Any suggestions? I know, it was a stupid mistake..