Explain how usin the talc.
You know how the barber uses the talc (your barber might not do this but probably half of all black barbers I met does this).
As a finisher like takes a lil spread it in his palm, then scrape the edge of the Andis in it then cuts your line. As a result a thin tracing of talc is left tracing your hairline.
But instead of using the andis I get like a business card or a metro card or sumn and do the same thing. Once I get it right and symmetrical I cut the line.
Im growing my hair out so I just do my hairline and facial hair. Havent been to the barber in over a year.