I accidentally took off the corner polarized filter from my screen.
I accidentally took off the corner polarized filter from my screen.
Hello, I understand you're dealing with a damaged polarizing filter from your old monitor. It sounds like the plastic screen protector may have been removed, leaving behind some residue. If you reattach it, you might encounter stains. You should carefully inspect the area—if there are visible marks or discoloration, gently cleaning with alcohol could help. Be cautious not to rub too hard, as this might worsen the damage.
The polarizer is secured using a transparent, optically clear adhesive. The dark marks result from minor scratches on the polarizer and an uneven coating. You can purchase fresh adhesive online—people often buy it to swap out old Game Boy polarizers—but achieving a flawless match may be difficult.
I simply left it as is. Attempting something else will probably worsen the situation, so it's wiser to allocate that funds for a replacement.
Without the polarizing filter, the image on the screen remains invisible. Simply take it off and use it with glasses to create a privacy barrier.