Artificial does not mean zero-maintenance — it means low-maintenance done right. The single best habit is dust control: a soft makeup brush or a cool hair-dryer on its lowest setting lifts dust without dulling the petals.
Keep arrangements out of prolonged direct sunlight. UV is the only thing that will fade premium dyes over years. Rotate vases a quarter-turn each month so any fading stays even.
If a stem ever looks tired, a lukewarm rinse with a drop of mild soap, air-dried upside down, restores the original sheen. Avoid hot water — it can relax the petal shaping.