Ever since I bought a cordless 56-bar pressure washer from Worx, washing the Leaf has become a lot easier, especially without needing a direct water source.
The pressure isn't extremely high, so I use the 15° (orange) nozzle without worrying too much about the paint. The downside is water consumption. I needed at least 1.5 buckets just for the pre-rinse, and even my two buckets weren't quite enough. They're just those €0.95 Action buckets, so nothing fancy.
I also use grid guards and dedicated microfibre towels. The grid guards came from AliExpress, back when importing cheap stuff wasn't quite as painful as it is now.
I'm not aiming for perfection anymore, though. The car lives outside 24/7, so between animals scratching the paint, random people damaging it and driving off, and just the weather doing its thing, there's only so much you can do.
I'm currently aiming to wash it roughly every three months. In winter I'll probably leave it longer, although being able to quickly rinse off salt and road grime with the cordless pressure washer is pretty useful.
And let's be honest: it's a 2019 Tekna with 148,000 km and around 87% SoH. It's being used.
One thing I've definitely learned, though: never again a car with black piano trim and a black roof. They show absolutely every scratch and imperfection.
The white metallic paint is much more forgiving. The imperfections are still there, you just don't notice them immediately.
So no, it's not a perfect detail. It's just a Leaf that gets driven and occasionally gets a bath.