Opening a #10 can, metal shards in flour

Posted by wakanda_banana@reddit | preppers | View on Reddit | 49 comments

I was opening a #10 can of flour today with what I thought was a good hand crank opener from costco. It kept going off the can so I had to realign it several times. This caused the metal to open unevenly and created tiny metal shards. I’m now throwing out all of this flour vs sifting and using a magnet for shards because it’s too dangerous to eat.

How do you avoid this? Is the opener just dull or something?