I need help with my NDS shoulder buttons

I am sure this question has been asked many times, but my NDS
shoulder buttons does not respond to my (hardcore) button-mashing.
I have searched the interwebs for an answer, but all I get is a fix that
only works TEMPORARILY:
"Form a seal around the L/R button using your lips, inhale deeply through nose, and blow [like there's no tomorrow]. This should remove the dust."
One solution I found requires this AND disassembling your DS. Which I find
VERY risky.
Do you guys have any other PERMANENT and RISK-FREE solution?
Thanks in advance.P.S
Please, don't let me thank in vain. ;)

First, This is in the wrong section.On-Topic.The only way I know that permanently fixes it is taking apart your DS, but don't worry, I've taking mine apart hundreds of times with no problems.EDIT:Don't worry about it being in the wrong section, it was moved.