mpc 1000 buttons sticking...anyone else have this problem???

i bought my mpc1000 off ebay about a year and a half ago everything was perfect but a few months ago i started to notice that most of my buttons (mode, window, all 4 navigation buttons, track mute, 16 level, f2,f3,f5) will only work if i press down really hard

i took it as no big deal but now its pretty much unbearable cuz it makes chopping a pain in the ass

anybody have advice on how i can fix this??

replace tact switches

http://www.mpcstuff.com/small-tact-swit ... utton.html