Amphibians tend to absorb water-soluble substances through their skin much easier than oil and fat-soluble compounds. Of course, entire populations of frogs have been destroyed through pollution by petroleum products. Rinsing the frog was probably a good idea. You might want to do that again, and maybe put out a shallow bowl of water for the little guy. Do you know what the insecticide in the soap is?

From my understanding its essentually soap with some seaweed amino acids in it that burn up the insides of soft bugs breathing ways. I'm not sure about the frog's fate yet. The greenhouse is about 20'x30' and he's nocturnal, so I only see him on occasion when he feels like poking his head out. We'll see....