Russ:

9 times out of 10, a super easy fix:

Pull out the head unit and take the casing apart to gain access to the "eye". Grab some Q-tips, dip them in clear rubbing alcohol and swab the glass lens of the eye. Wipe with lint-free cloth. Worked for me on every CD player I ever had.

However, if you listen to country, NOTHING will improve the music.