Sorry but it will need cleaning. My elderly FIL got some really top class artificial turf laid with a permeable base three years ago. It looked fantastic, at a casual glance you could not tell it was artificial. He loves a lawn but age meant he was not up to keeping it looking good so this was his solution.
So comparing the upkeep to natural grass its less work because compared to mowing, feeding, scarifying, watering, and dealing with mud, the upkeep feels minimal. But “minimal” is not the same as “none”. It’s like saying laminate flooring doesn’t need cleaning because you don’t have to polish it, technically true, but also completely wrong.
Even though it’s a plastic lawn, it still collects dust and airborne dirt, leaves and organic debris, dog/cat wee residue (this is the big one), spilled drinks, food, dog/cat/bird poo, algae or moss in damp, shaded areas etc. If you don’t clean it, it starts to smell, looks dull, and the fibres mat down. People who say “it doesn’t need cleaning” usually mean you don’t have to mow it, which is true but it’s not maintenance‑free.
Most quality installers recommend a rinse every few weeks (especially if dogs use it), A brush‑up to lift flattened fibres, A disinfectant treatment a few times a year, A professional clean annually if you want it looking fresh.
My FIL was also advised to sand it! Artificial turf often uses infill, usually kiln‑dried sand to weigh the turf down, keep the blades upright, improve drainage, reduce heat build‑up. Over time, some of that sand shifts or washes out, so installers top it up during annual maintenance. That’s the “sanding”.
If someone claims theirs “never needs sanding”, it’s either very new, very low‑pile turf, or they simply don’t realise the installer added infill in the first place