The thumbstick on one of my touch controllers has become oversensitive and moves me forward from the slightest touch, sometimes from no touch at all. I thought this might be due to wear and tear over 2.5 years but I have been blowing compressed air into the thumbstick on the off-chance that it might be due to debris stuck inside but I haven't noticed any change yet.

Is there anything else I should try before buying new controllers?