I use a jet-washer. Quick wipe over with a microfibre cloth on plastics and screen and away in the (gently heated) garage she goes.
No doubt all the pots, potions and brush-loving doom-monger brigade will be along soon to foretell of the imminent disintegration of my bike. However, not a sign of corrosion so far (12 months) and I used the same technique on my RT which also looked immaculate when it went after three years.
Still, if you prefer being on your hands and knees cleaning the engine with a toothbrush rather than riding, I guess that's up to you!