PSP Buttons Problem !!!

Recently im playing SBA2 And Dissidia 012 Final fantasy poolish my skills one day ive borrow my psp to a friend 1 week after getting it back my O Button and my X button are stuck so i cant cancel in sba2 and i cant cancel in dissdia i know the method to fix them unscrew the psp ... with a small screwdriver but since i dont have a really really small i will like too know how to fix those buttons without unscrewing the psp oh and i forgot to tell u all my psp is a fat 1001

blow on inbetween the cracks of the buttons really hard. if that doesn't work just buy get a tooth ick or sumthin and unblock the buttons