Does one have to wash hands 3 times after haircut or shaving?
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”.