About the technique, I think is completly needed someone tell us how to use paper towels. In my country is better to use electrical dryer, otherwise malls or buiding offices has to fire claning staff and pick up papers conteiner every 4 hours. So more expenses. it´s incredible how people waste two or three towels to dry their hands. Towels are designed to one be enough. I use just one because I had the correct information but I didn't know I had to shake my hands ten times. I'll put in practice and I'll definetlly teach this to may family and students.