G15 Keyboard keys stuck. Any Suggestions?

[ryan29121]

I have a g15 keyboard, older style (blue LED and flip up screen), that many of the keys are stuck. Awhile back, I took all the keys off to clean the entire keyboard. After cleaning I put all the keys back on with not much hassle. Ever since then, I notice that many of the G-keys on the left are stuck.( really hard to press down and will not come up after pressing) Is there a way to fix this so it will work better? I checked the keys and there is nothing in the way. The keys are also in the right position. Should I apply a little amount of light oil to help it? What do you recommend?