If I suspect a leak, I'll put about 5 psi on the can and invert it in the sink. If there are any bubbles, I take it out, reset the lid and try again. Then it's soapy time.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk