What the cover changes

The cleaning method depends on what covers the print, not on the artist. A glass cover takes a standard glass cleaner. Plexiglass and acrylic scratch far more easily and need a softer approach. A cloth that feels harmless can leave fine scratches that show up as haze the next time the light hits the surface. Identify the cover before you touch anything. If the framing was recent and the shop gave you a material note, use that. If not, treat it as the more delicate option until you know otherwise.

A dry microfiber cloth is the safest starting point for any cover. Wipe once a month and only when you can see dust. Rubbing a clean surface does more damage than leaving it alone. For a plexiglass cover, spray the cloth lightly with water or a cleaner made for acrylic, then wipe in a single direction. Never spray directly onto the framed poster, because liquid runs into the frame edge and behind the print. That is where damage becomes hard to see and harder to reverse.

Do and do not

The list below separates routine care from the habits that cause the damage people notice years later. Most of the risk comes from the cloth, the cleaner and the angle of the room, not from the poster itself. A print with a clear protective cover already has the main protection built in, which is why the question of a clear protective cover matters before you buy rather than after.

Keep the framed poster out of direct sun and away from heat vents. Sun fades pigment and warms the cover, which speeds up the slow yellowing that shows up on older acrylic. If you want the print to stay legible for decades, the room matters as much as the cloth. A north facing wall is kinder than a south one, and a print above a radiator will age faster than one on a cooler wall.

When to stop and ask

Some problems are not cleaning problems. A cloudy patch that does not lift with a damp cloth is usually inside the cover or at the edge, not on it. That is a seal or moisture issue, and more wiping will not fix it. If the print itself looks dull, the cover may be scratched or the print may have been exposed to heat or light for too long. At that point the question is whether the framing is still doing its job, not whether you used the wrong spray.

If you are deciding whether a framed poster of Agustin Cardenas's work suits a room, the care question is only part of the answer. The room's light, the wall colour and the size of the print all change how the work reads and how hard it is to keep clean. A print in a bright room needs more frequent dusting and ages faster. A print in a darker room stays cleaner longer but may look flat unless the wall around it is chosen with care.