Trying to fix button not a good idea,you need to replace button with new one.

I had problem with air button sticking... Not sure if tile adhesive got in it and causing it to get stuck, but I was able to get it. I disconnected the air tube from the motor. I took my air compressor with a blower nozzle on it and blew into the disconnected air line. Be careful if doing, my button popped out with the cover plate and the rubber piece blew up like a balloon. I was worried that I had popped this rubber piece, but I put back together and worked better than it had before it was stuck. If anyone is going to try this be careful not to over pressurize it. I just pulled trigger on nozzle real quick.

Buy dent fix for cars 'Pops a Dent' or if you want to do cheap, using glue gun on bottom of small tool handle that is semi flat (also that fits in spa button hole) put enough hot glue to cover handle bottom and stick it to the jet button and hold it in place till sets (8 min) and pull. *
Try not to put too much glue so it wont still to the sides of button hole.