Need a fix before getting your Sanwas/Seimitsus/ILs? The below method has worked for me 100% of the time with over 16 buttons.
Everyone pretty much reports that one or two of the original SE buttons sticks. This is obvious if you test each button by pressing the outer edge of the plunger – it will not go in smoothly and pretty much just struggle on the way down.
For most of the time, I always just assumed it was a crappy switch – the Madcatz switch is after all quite different than the Sanwa switch. However, after some accidental testing I found out that the switch isn’t entirely at fault.
A stuck button that I opened up appeared to be perfect on the inside. Using my finger to depress the switch at an edge did not cause a problem – I assumed it was just the shape of the switch afterward. Wrong again. When I replaced the plunger, all of a sudden the button worked perfectly – and I mean perfectly.
What’s wrong with the button then? It’s probably a wild guess, but I think the plunger pegs are too far out, or placed uncentered on the switch. Depressing them with a flat head seems to push them in a bit permanently. Pressing the button at most angles proved to be smooth afterward.
Take the plunger out of the button by depressing the two little levers on the side of the plunger.
Twist off the micro switch (counterclockwise) at the bottom.
Put each back in any order.
Optional: Spray a bit of Silicone lube at the edge of the white switch. You may find the lube to be handy for fixing the stock stick as well (squeaky switches/spring). I never did this.