 Most people see these little red dots underneath the leaf. Those are the eggs. So the key, if you can find the eggs, obviously, is to get rid of those before. Don't keep them. Don't think they're little and cute. They're bad. So red little egg masses, get rid of them. If you've missed that, and again, they're busy reproducing, you can hand-squeeze them, pick them off and dunk them if you have the time.