Clean the glass before the frame

Start with the glass, because that is where dust settles and where a wet cloth does the least harm. Use a dry microfiber cloth and wipe in one direction, not in circles. Circles grind grit into the surface and leave faint swirls that show up under indoor light. If the glass still looks marked, dampen a corner of the cloth with water only, wring it out well, and pass it over the glass once. Never spray cleaner onto the framed poster. Liquid runs into the join between glass and frame and can reach the print edge. Atsuko Tanaka's work often uses strong flat colour, and a smear on the glass reads as a flaw in the image itself. Work top to bottom so runoff does not streak back over a cleaned area.

The frame edge needs a different touch. A soft brush, or the dry cloth folded to a narrow edge, removes dust from the corner where the frame meets the glass. This is the part most people skip, and it is where grime builds quietly over a year or two. If the frame has a wood or laminate finish, follow the grain with the cloth rather than rubbing across it. A second pass with the dry cloth catches any moisture left from the glass cleaning. The goal is a surface that looks clean at arm's length, not a surface that has been worked over until it shines. Overcleaning wears finishes faster than dust does.

Protect the print and the room

The print behind the glass is the part you cannot reach, which is the point of the frame. That protection only holds if the glass stays sealed and the room stays dry. Check the back of the frame now and then for dust that has worked through the backing, and for any gap where the seal looks loose. A framed poster of Atsuko Tanaka's work is still a paper print, and paper reacts to humidity more than a canvas does. In a damp room the edges can curl slightly over time, and in a very dry room the backing can loosen. Neither problem is fixed by cleaning. It is fixed by where the piece hangs and how the room behaves.

Hang the piece away from direct sun and away from a heat source such as a radiator or a vent. Sun fades pigment slowly, and heat dries the materials unevenly. A wall that gets morning light is usually fine; a wall that gets afternoon sun all day is not. If you want to read more about how size and room scale affect placement, the guide on which size of Atsuko Tanaka print would look best in a small living room covers that trade-off without promising a single right answer. The practical point is that a clean surface lasts longer when the room is not working against it.

Know when not to clean it yourself

There is a line where cleaning stops and repair begins. If the glass has a chip, a crack, or a loose corner, do not press on it with a cloth. If the print itself is visible through the glass and has a stain, a crease, or a lifted edge, cleaning the front will not fix it and may make it more obvious. A framed poster of Atsuko Tanaka's work is a reproduction, not an original, so the question is usually about appearance rather than value. That still leaves the surface you look at every day. A yellowing glass or a cloudy film between the glass and the print is often a seal problem, not a dirt problem, and it needs the frame opened by someone who handles that sort of work.

If you are unsure whether a mark is on the glass or on the print, compare the angle with a flashlight held at a shallow slant. A mark on the glass shifts as you move; a mark on the print stays fixed. That test saves a lot of unnecessary wiping. When the piece is hanging in a room you use heavily, a quick dust once a month is enough and a deeper clean twice a year is plenty. More frequent cleaning rarely improves the look and does increase the chance of a stray drop or a scratched edge. The aim is to keep the surface steady, not to keep it perfect.