Soapy water will be just as harmful to the ladybugs, particularly the larvae which eat hundreds of aphids per day. Dish soap will also be dehydrating and will destroy the ladybug eggs.
If you already have the Garden Patrol on the job, I would let them do their work. They are reproducing which means self sustaining aphid control. Other predators are probably working too, even if you have not seen them.
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