My DS is broken from being repaired...xD?

Well basically, my DS has been repaired several times, mostly for the touch screen. The panel that they have to take off to fix it(the plastic covering the top of the bottom half, goes around the touch screen, D pad, a y c x buttons, etc...) is loose at one corner and bounces every time I try to push the buttons. It hasn't started hindering its performance yet, but I have the feeling its going to let looser and looser until its dealt with.

I'm doubting Nintendo can fix it(although I must say, they've been INCREDIBLE customer service-wise, haven't made me pay a dime for any of the repairs), but is there anything I can do to fix it myself?

Apart from superglue, which seems to be the most popular answer from friends and family >>;