I've been using the ax2 (on my 2nd one) for 10 or so years and the footswitches have been a periodic problem. Early on I decided to take care of the problem myself. If the Pod switches are the same there can be a couple of problems ... both concerning that little spring that makes contact with the pc board switch. These springs can get a little crooked or compressed over time and just need to be straightened or stretched out (a little) . I'm no repair man but there are some things we novices can do on our own.
a HUGE +1 to this post. The MAJORITY of FS problems can be fixed this way. The physical part of the switch is almost indestructible and in fact NEVER makes contact with the circuit board no matter how hard you press down. The switch on the circuit board rarely if ever fails, while it may have a bad solder joint once in a blue moon. It is usually the spring that is positioned between the physical FS and the circuit board that is the culprit. My experience on many boards including ones for other systems (Digitech) is the springs get compressed and no longer impart enough pressure to the contact above the circuit board switch resulting in poor operation. Simply spraying contact cleaner may release a sticking switch but won't fix the spring problem.
Its a dead simple fix if you want to take the unit apart. Just take the spring and give it a little pull to extend its length a bit and you're back in business. The switches on the circuit board work the same as the ones on your keyboard, they are just pressure sensitive contact switches, not physical switches as you might suspect. Use a can of compressed air while you are in there to blow out the cobwebs if any and you should be good to go. Don't extend the springs too long or you might have a switch stuck on but I have never had that problem.
Hey, its free and its worth a shot...