What is one supposed to do when one gets a haircut or uses a public restroom in terms of washing hands? If there is no way to wash outside the bathroom?
Thank you for your question.
When a person is faced with a situation that there is no option but to wash inside the bathroom, such as in a public restroom of on a plane, we wash our hands in the restroom, and wipe them outside.
Sharei Teshuva O:CH 4-1, Piskei Teshuvos O:CH 4-19.