I'm just curious is it an issue or I just take very poor care of my stuff.

I have a couple of SNESes (like 6) and recently I had some friends over for some Street Fighter Action. and I found I had to press really hard for the start button to respond...and this isn't in just one or 2 controllers...but at least 5. I'm curious if any of you guys have experienced snes controllers with really poor start buttons.

any info would be greatly appreciated.