Huntsman elite no volume control

Hi, i have a huntsman elite K/B, and for a long time ago, the optical switch at the upper right corner of the keyboard, does not working properly. It's because some dust or a thin hair from my cat has been penetrated into it and now actually confuses the sensor with result not to deliver the right command for volume + or - Is there any way to clean the switch without doing a sergury to the hole keyboard?? Thank in advance