Bugs in the lettuce update

Soapy water sprayed in leaves and down in between them worked great on the aphids nesting in my salad bowl lettuce. It works quickly, and so far I have only seen a few more which I sprayed right away. I also sprayed plants that did not have the bugs visibly on them, but had been munched on, and so far I am not seeing new damage just came back from weeks vacation and here is my lettuce.