If you’re worried the bread method won’t work, there are a few other tips you can keep in mind. First and foremost, a practical tip: Use a sharp knife. This is something that you should be doing anyway, as dull knives can be dangerous, but a sharp knife can also help with the onion crying problem. This is because a sharp knife will damage the onion flesh less than a dull knife, which releases less of the gas that makes you cry.
Next, put your onion in the fridge for at least 30 minutes before you need to start cutting it — cold temperatures slow down chemical reactions, which will delay the onion’s release of gas. Another method is to cut the onion underneath the kitchen vent or near a fan, which will sweep the tear-inducing sulfoxides away from your eyes.