I use this..
As a multi-purpose fungicide, miticide, and insecticide, Bonide's Neem Oil is perfect as an all around product for organic gardening. The active is a neen oil extract, that derives from neem seed.
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I have never used anything that specifies dish soap... although I do know that trick from other gardening. Ive just never applied that to this particular kind of crop, lol. I dont know for sure but would advise against it.
Go to home depot and pick this up and giv'em hell!!
Its a tricky thing... to dry can kill important microbial colony in your soil.... I do the simple "pot lift" technique to get a quick feel for when its light and then come behind with one of these to be sure:
Amazon.com : Strailboard Soil pH Meter, Soil Moisture Meter 3-in-1 Moisture, Light and PH Test Kits, Plant Care for Garden, Lawn, Farm, Indoor & Outdoor : Garden & Outdoor
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It also does soil PH.. they're cheap and I have 3 of them! lol.. (Im to cheap for the BlueLab pens, lol). If I have to adjust soil PH, I will flush up or down and check the FIRST bit of runoff with my PH meter, I also have 3 of those that I calibrate with solution once a month.... yea ive had my arse kicked by soil PH issues and learned the hard way! lol.. im still scarred from those battles. lol.
Yes, rain water can screw things up if your not growing in the ground where theres the microbial/fungal/bacterial ecosystem in place that buffers that PH. Pull her under the cover and hand water your girl with what she needs, shell love you for it.