It may be better to use an unused brush if you are trying to apply eyeliner. Bacteria can easily get in your eye since the brush is so close.
Take care to not let the primer or lotion touch your eyeball. It will not cause harm, but it will be painful.
You can also try to use Vaseline. Do not apply so much Vaseline so that the brush is clogged up, but try to make it damp.
Try to use a darker eyeshadow so that it resembles an eyeliner color. Good colors include brown, black, plum or dark green.
Try to keep the brush as close to the lash line as possible for an accurate draw. Press the tip of the angled brush to your eyelid so you’re stamping the eyeshadow in place. [2] X Expert Source Alana SchoberPout Pro Makeup Artist Expert Interview. 15 June 2021.
Try to set it with a translucent powder so that it does not smudge throughout the day.