Replace it?

Hey everyone just want to know if my analog stick is screwed or just i uno...
Any way so i was playing pokemon and i put the psp down for a second i come back and im all of a sudden in a random fight o.o
so i finish the battle and start walkin i stoped to look at my tv for a second and when i looked back it was moving all by itself.. :\
So i took my psp apart detachedd the analog stick and well blew on it xD
put it back on put together my psp and it was fine :D :thumbup:
but... a few days later it started to act up again.. so i repleated what i did and it worked..
im getting sick of taking my psp apart... is it actually broken? should i buy a new one?
*i mean buy a replacment analog stick... not a whole new psp..*

Check that you didnt tighten the four screws on the back to tight and also that you didnt tighten the anolog to tight to the psp. also if the faceplace feels wobbly try pushing down next to the analog and see if that works, try see if there is any dust on the gold rim inside the psp next to the analog. as you can tell i have had alot of problems with the analog!! lmao!!

aight ill try if i can get this bloody screw off
Its not even shredded so i dont know why it aint coming out :\

replace it...
if u dont know...