youngoldbloke
The older I get, the faster I used to be ...
Spray all over with diluted Fenwicks FS1, leave around 10-15 min, then rinse off with hose - low pressure - very fine spray, not directed at bearings in hubs, bottom bracket, or anything sensitive. Sponge/soft brush if required, but usually just the Fenwicks and rinse is sufficient. Bounce bike once or twice to remove surplus water, leave to drain for a short time, then light spray all over with GT85. Later go over bike with soft cloth.