The next time you use the public toilet, observe what the others do. You would notice that probably only 1 out of 5 would be washing their hands with soap. The rest would just run their hands under the water for a bit. Yes, go on...make the observation. You'll be shocked as well.
I know the above guidelines seem like what the doctors and nurses would do. I don't follow such strict guidelines but I do ensure at least up to Step 3.