how to clean the 6 disk cd player it keeps reading error

Hello, your concern is not with the unit itself -- in a serviceable way. You can't "clean" it. First, analyze the discs you are using. Are they new, pristine, unplayed discs? Are they "burned" discs from your PC? You'll find varying results depending on format. The reported life span of.a CD player laser is 10-15 years. So that should figure in as far as reliability. You may need a replacement unit.