Hi all, I have an Elite Screens ER150WH2 SableFrame 2 I am not sure what happened to it but when watching bright scenes especially white backgrounds, I could see very noticeable and distracting sort of diagonal marks (not sure what I would call them. dirt?stains?marks?artifacts?) around the center of the screen. I would really appreciate it if anyone who had experienced something similar and managed to remove them, would share the solution. I think its gradually getting worse as in they started to spread to other areas of the screen. For reference I have attached a photo and a short video(external google photos links for higher res https://*******/cleanelitescreens) Hopefully they are clear enough. Please let me know if you need more information. Thank you in advance.