I got absolutely filthy doing network installation work at a job site, so I used the gender-affirming one of the facility's gendered public restrooms to wash up. I cut myself as well (IDK how), so I used the same gender-affirming sink to clean it for a band-aid.

No one knew, and the only evidence anyone will find is of someone leaving the restroom at least as clean as she found it. Truly the perfect crime! Nyahahahahaa!