Keyboard Buttons working whenever they want

Hello,
I have an ASUS K571GT and I've noticed in the past 2 months, certain keyboard buttons are working whenever they want.

Pushing the 1 button: Tapping it once will either produce nothing, or 111 in a row. Shift 1 doesn't produce a ! anymore.

Pushing the q button: Will produce 5 qqqqq in a row. Shift q doesn't produce a capital q. Similar to Pushing the 1 button, If I tapped the q button 7 times, it will makes 33 q's in a row.

Pushing the Tab button: Does the same thing. Tap it once and its as if I hit the tab button 3-5 times.

I popped up the 3 buttons, cleaned them, air dusted there to take out any debris. I pushed the buttons and it all worked, perfect!
Popped them all back on. Worked for 5min before they stopped working.
Holding down the right shift button wouldn't produce a capital Q, but holding  down the left one can? And then that stopped working too.

Anybody know what's wrong? Or have any solutions?