Bruh I use clippers too
What u have to do is shave down, in the direction ur hair grows. The jawline is weird cuz the hair can grow in different directions sometimes.
I also use a facial scrub (tea tree oil I believe) before I shave and everyday if I can remember.
After I shave I use
This has been working very well for me. You're gonna have to accept that you'll get bumps sometimes. When that happens let ur shyt grow out for a week or two and then shave, the bumps will be gone and continue with the routine.
I think the biggest thing is using clippers and shaving in the direction your hair grows