Are employees supposed to wash their hands before doing shade matches?

I don’t want to be one of those people, but I am curious if employees who offer to shade match you are supposed to wash their hands before? I went in to look for a new foundation and pick up a couple other things and an employee in MAC offered to shade match me. I already had makeup on, so she took some of it off on my jawline and chin with makeup remover. Took three different shades and put them on a clear plate and swatched them on my neck. We were able to find my perfect match, so she proceeded to put some more on my jawline and entire chin with a sponge. I didn’t realize until after she applied the foundation that I didn’t see her wash her hands before. I have really bad contamination ocd (currently in therapy for it), so I am now freaking out that I am going to catch some illness from all of this.