Issue with directional inputs Qanba

I’ve had my Qanba stick for a good 2 years now and it’s been working beautifully, except last night I’ve discovered a problem while trying to play some SF. On P1 side, sometimes when I hit down down back, it takes a good second to half a second for it to register the down back input, which in turn leads to me not being able to hold a charge, block low, and generally not able to play properly.

I just want to ask you all what this could possibly be and get an idea as to what I’m in for before I open the stick up and start messing with it. One of my friends said that it could be that there is some dirt collected on the base of the stick after all these years of never cleaning it once, but I’m not so sure. Any input would be greatly appreciated.

You need to replace your left or down microswitch.