Identify three things before cleaning: whether the object is PLA, resin, or another material; whether it is painted; and whether a protective topcoat is present. Similar-looking objects can require different care. Without a material card, begin with a soft brush, lens blower, or low cool airflow to lift dust from scales and recesses.
Start any damp cleaning with a barely moist soft cloth and a hidden spot test. Do not let water collect in seams, cavities, or beneath the base, and do not grind layer lines with an abrasive sponge. Alcohol, acetone, and other strong solvents can alter resin, pigment, or varnish. A chemical used during manufacturing is not automatically safe for routine care of the finished object.
Environment matters more than aggressive cleaning. Prusa notes PLA's limited heat and UV resistance, while Formlabs warns that prolonged sunlight can discolor and embrittle resin parts. Avoid closed cars, heater vents, and intense sunny windows. Keep the base stable so one fall does not create irreversible damage.
A light monthly dusting is usually gentler than a deep wash after neglect. Photograph the new object and note color, seams, and thin projections. Stop using it and contact the maker if cracks, warping, tackiness, or persistent odor appears. Care is not an attempt to freeze the piece at unboxing; it is a way to let age remain understandable and manageable.