No, I don’t think there is a trick… I just thought you did something weird, because I’ve literally never hurt myself opening these or even had any problems at all.

I just opened one of these to test. What I do is I use my fingernails to get below the tab, which is extremely easy. The harder part would be to lift it up with my fingernails, which I don’t do, instead, after lifting the tab up just a tiny bit with my fingernails, I push my finger further in so that a bit of my flesh goes in between the tab and the lid, which gives me a bit more leverage to lift the tab. I then repeat this one more time, after which my whole finger is in the hole. I can then just remove the lid by holding the can with one hand, then pulling the lid in a 45° angle with the finger through the hole.

I just never thought about that there could be a problem opening these and I wondered what exactly you were doing to make it hard.