@SurfNTurf - I agree and I also want to say that grooming your hair and making sure that you bathe the morning of your interview is important because interviewers might also look at your fingernails and if they appear dirty this could also turn them off.
Also grooming your hair and keeping it in a simple style is important. For example, if you have long hair you could pull it back into a French twist so that it looks more polished and professional. Pulling your hair back allows the interviewer to focus on you and not your hair.
I always did this with my hair and found that I was also more confident in my interviews because I looked more professional.