Does one have to wash hands 3 times after haircut or shaving?
Answer:
Although this is an issue of ruach ra’ah, poskim write that it is sufficient to do netilas yadayim once. See Ben Ish Chai (Toldos 18), Kaf Hachayim (4:62), among others. Ben Ish Chai writes that this is because the degree of ruach ra’ah is lesser. Kaf Hachaim mentions that one who washes three times “kadosh yomar lo”.