CAN YOUR CAN OPENER OPEN YOUR CAN?

So, I was having an issue with my can opener the other day. It was grinding along, not cutting the can as smoothly as it had when I had first purchased it. My hand was going into spasms from trying to crank the handle so hard…
Now, I cook in a lot of homes and deal with a lot of can openers , from cheap dollar store types to super high tech-cut on their own- fancy ones…
I have found that 2 things cause can openers to fail, and when these two things combine they make for a very inefficient tool…that is MOISTURE and TIME.