Hiya,
Try fully uninstalling the sw for it if you use it
Somert like uruninstaller or alike
Redo directx
Redo sw if used for stick
Recal in windose
This is of course after checking the stick etc is default in ah
If still same probs i guess ya best strip stick n clean all gummings inside
Take ya time if ya have too and either digicam as ya take apart or sketch (i meant as an aid if needed if unsure)
Clean lense with detergant/water or alcohol etc, Remove any gunge fluff etc
Around the trigger hat assemblies you will no doubt be amazed at the amount of skin matter/gunge etc lol
Now if this fails i'd say run a meter along cable to see if constant moving/usage has twisted n fubared the wiring (easy to replace if it has
Directx has fubared on me a few times when i've used some reg cleaners so it's worth a try at least
Hope ya sort it ohh and while your at it if the sticks took apart re-stretch the spring a bit it will take any usage/slack up

I guess if ah etc if at defaults its in need of a good clean on hat switches etc
LOL spelt alcohol wrong sheesh i bad