It depends if they are bristly hairs or soft fine ones.
I have both. I use (wait for it) a LIGHTER on my chin and neck. Steps below.
1) Tie your hair back.
2) Stand, glasses on if needed, in front of a good, static mirror.
3) Light the lighter and pass it at a steady pace over your chin and neck.
You need to work out how slowly you can go, without burning yourself. Too fast and the flame goes out. Too fast and the hairs aren't singed and got rid of.
I do this to rid myself of the fine hairs. Then I pluck the bristly / beard hairs.
For my top lip, I wax. I can't bear the flame on my lip. Too sensitive.
They do this in Turkey/arabic countries to rid ladies of fine hair. Works a treat.