When I was 15 or 16 years old, I started to study at a health school; There they taught me that I should wash my hands every time I finished caring for a patient, and also before starting to care for the next one. They were very strict. I didn't get used to doing it willingly, until without realizing it, I did it mechanically. Nowadays I do it everywhere, at home, on the street, with patients.
At first I thought it was a bad practice that wasted time, over the years I learned that it was one of the best things that studying health professions for so many years gave me.