use a Knife !
I've got several of them. Best can opener ever made in my mind.Manual can openers! This one been around since the early 80's!
View attachment 885884
Just like the toaster behind it. Long time also!
View attachment 885885
Susan can't handle my can opener at all! Plus she claims I use it the wrong way! I lay the can opener on top and it cuts off the top leaving no sharp edges!