Depends on whether the bike is all-over dirty (like riding in rain) or just "front-dirty" from regular riding with typical bug catching.
For all-over wash, I put the hose sprayer on the "mist" position and mist the entire bike, let it sit for 5-10 minutes to soften things up, then sparay off the loose stuff. Then spray S100 everywhere and let sit for 5-10. Brush the heavy dirt and grease areas, then power rinse and blow dry.
If it's just the frontal areas that need cleaning, I use a generic lemon furniture polish (wife found one at Dollar Store which has a high concentration of oily solvent). Spray the buggy areas, let it soak 5-10 minutes, then wipe off all the bugs with a micro-fiber cloth. Turn cloth to a clean area and rub in the left-over polish. Done.