I relentlessly pursue these little things and given half a chance, they regain territory. I use oil and soap spray and my plants get oily and burnt. I slap them with my hands and scrape them with my nails and crush them with my fingers. The next day, there are more. Insecticides in an edible garden is a no-no, so I've resorted to the old fashioned way. Prune all leaves off. In an edible garden, that's a yes-yes. Whatever you prune, you also eat. I reckon that I also munch up quite a few insect eggs because if the insects are fullstops, then their eggs cannot be seen with the naked eye. At least, I don't see eggs, but the insects always come back!
Yup! Small is powerful. I'm big and a loser. But man! Even if I'm losing, I'm still gonna get them good.