Can the screen material be cleaned?
Many small areas such as streaks or smudges can be carefully cleaned with a mild detergent (soap) diluted to 30% to 40% with water and applied with a soft, non-abrasive cloth or a gentle brush (e.g. a soft toothbrush). If this does not work, you can also use a non-ammonia all-purpose cleaner such as 409 to clean the affected area - just be sure not to scrub too hard in one spot since this may cause the material to wear out in that spot.
We also recommend using Isopropyl Alcohol for cleaning the screen material.
A lint roller is recommended for cleaning the black velvet frame.