There are 3 main options available (they soudnt obvious yes, but well worth goingthrough "each step")

1) be sure the right analog is clean. I presume you are right handed (90% are, I myself am left handed so i have this issue in reverse haha). You may not think it off hand, but how much dirt and grime etc do you gather from eating/picking things up, adjusting things etc etc??!

2) see if any of the parts have come loose. If this is the case, you may need to unscrew a few bits. If you keep track of which screw goes to which section, you shouldnt have much issue fixing it back together again.

3) worse case scenario, buying a new pad. It happens to the best of us. I personally use a GAMEware pad. It's from the supplier known as Game and is about £16 (not a final price, just rushing it off my head). It has served me through many games and I personally think the quality is excelent (no major issues so far). If anyone has any other recommmendations of brands, pls let the forum (mainly the OP) know of the pros of your favorite controller purchase

Lucinda xXx