

Put a tiny bit of rubbing alcohol on the end you removed the cotton from. Remove most of the cotton from one end of the swab. If the lint is packed tightly and can't be blown out, try a cotton swab.This may be enough to remove anything that's built up in the jack.

If you see lint, blow into the headphone jack or shoot some compressed air into it (compressed air is better since it doesn't have the moisture that's present in breath, but not everyone has it handy).You may need to shine a light into the jack to get a good look. Look into the headphone jack to check for lint.
