hi guys! ever since i've bought my psp half a year ago i had troubles with it's analog stick. the stick is VERY hard to move and when it does move the movement is very choppy(like a coke or something was spiled there and now it blocks the movement). it's so hard to use that i am forced to skip most games that involve the a-stick.so finnaly i've decided to do something about it. my question is: is this a common problem? and is there ANYTHING i can do to fix it? thx in advance.