Hi all, I was hoping for some advice about my basil plant's leaves developing some little black spots. Our indoor basil plant had some aphids destroying it so four days ago I gave it a decent spray with Nature's,Way Pest Spray (active ingredient potassium salts of fatty acids). Since then all the bugs seem to have gone but my basil leaves have developed black spots, especially on the lower leaves (pictures attached). I don't think it's overwatered, if anything we're very careful to water only every few days if the soil feels dry because we previously killed a plant with overwatering. Our basil plant lives next to a window, we're in Australia and it's currently a rainy summer. Any advice as to what is causing this and how to fix it would be greatly appreciated. Thank you in advance!