When people get older, they get wrinkled.
When headphones get older, they get crackled.
The problem is not in your computer, it is the natural aging of headphones.
What you need:
- Baby oil
- Dishwasher soap, a good brand preferably.
- Soft brush
What to do:
1. Mix the baby oil, the soap and the water.
2. Take the 3.5 mm jack and put it in the mix.
3. Use the brush to stir it for 15 minutes.
This will clean any unwanted particles out of your headphones.
But this will not get rid of the crackling sound immediately. For that, you need to do this everyday before you go to sleep. In couple of weeks, the headphones will be shiny new with no cracks or hisses.