Late coming to this thread.
I use a bucket of hot water with dish washing soap and a long-handled, soft-bristled brush. Get the whole bike wet, then I brush down the frame. Clean the wheels. If I’m cleaning the drivetrain, I’ll get a second brush with stiffer bristles and use it on the drive train.
Just make sure you don’t use the same brush on the drivetrain that you use on the rims. You’ll grease up your brakes quite nicely.
Rinse it lightly, wipe off the excess water with an old towel and you’re good to go. As always, don’t spray a jet of water against any bearings (Headset, bottom bracket, hubs).
LOve,
PEte