As a general rule Stewart Filmscreen projection screens require little if any cleaning. We sometimes get questions regarding periodic or maintenance schedules for the screens. The reason for not cleaning a projection screen is to avoid damage or abrasion marks to the screen's optical viewing surface. As you might imagine, improper or robust cleaning attempts will degrade the visual integrity of the screen. This is especially true for the screens listed below. Therefore the less contact during its life is the best plan for preserving the screen's optimal performance.

1. Use a draftsman's style brush or general purpose soft dust brush to lightly whisk away any loose dust or dirt particles from the screens image surface. Do not allow the body of the brush to contact the screen while cleaning as it will scratch or damage the image surface. Do not use sharp instruments or knives to pick off any attached particles or debris. This too can cause damage to the screen. A vacuum with a soft bristle brush attachment may be carefully used to remove dust only if deemed necessary. Do not use a vacuum brush that has "stiff' bristles. This will ruin the screen.

Sometimes small insects or bugs will become entrapped in roller screens. In this situation a small vertically repeating dimple pattern will be present on the screen. Roll down the screen to its fullest extended position. Use a flashlight to inspect the areas just below the roller tube and the backside of the screen.

When the bug or insect is located, remove it. The dimple pattern will eventually flatten out and disappear in a few days. A periodic cleaning of the backside of the screen is advisable. If possible, simply wipe the backside with a clean damp cloth or sponge. This removes long-term dust build up and other debris particles from the back of the screen.

2. For tougher spots or marks, it may be required to use a warm water based detergent solution. Simple Green, 409, Fantastik or other water based industrial cleaners can be mixed with warm water to make a screen cleaning solution. Use a clean sponge, cotton cloth or Q-Tip with this solution to gently lift off these types of marks.

Use a gentle "soaking and lifting" action when cleaning projection screens. Never use an aggressive scrubbing action as you will damage the screen's image surface. If needed the affected area may be rinsed with clear water and dabbed dry with a clean sponge or cloth. Do not worry about or attempt to dry any residual watermarks, as they will evaporate within a few minutes. Also use minimal cleaning attempts or passes to aid in preserving the screen's visual optics.

Should the entire screen require cleaning, always work in sections from top to bottom. Only apply the cleaning solution to the sponge or towel as opposed to spraying directly on the screen. This avoids creating streaks or runs which can be difficult to remove. Remember; avoid attempting to dry the residual watermarks as they will evaporate in a few minutes.

NEVER use solvents, abrasive cleaners or chemicals of any kind to clean the screen. Contact the factory if you are unsure of these instructions or if you are faced with a difficult or challenging cleaning situation. Most paints and inks will be impossible to remove. With reasonable care you may expect many years of trouble-free use of your Stewart Projection Screen.