I would have a groomer do it. Bentely had a lot of hair around his eyes that were stained and i just took him to my groomer and she just got out her trimmer and did it real quick...and it was free
when i try to groom him, he gets all wiggly and that makes me nervous especially if im using a trimmer! but when he is at the groomers he seems to sit still, probably cause he is so scared! haha