I looked back at recent video of sighting in new ammo, I think 6 shots were taken before this one and I notice no glow in the video. Now they were not fast shots, it was probably 50 degrees outside and there was probably 2-3 minutes between each shot. I can’t imagine just for the glow in the scope from thermal it would be worth it in my case. I do see the glow after I shoot a couple times closer together than this, but it seems to go away quickly. I don’t know how it stays fairly warm for several minutes but not super hot. Someone who has covered one it would be interesting to see video of 4 quick shots covered vs uncovered if you had to keep shooting.