Answer: From the sounds of things, the tender leaves of your peppers and eggplants are suffering sunscald. Your efforts to protect them are on the right track, except I suggest some sort of polyester row cover (such as reemay), which will create a more moderate climate around the plants than the little bottle cloches you made. Feed them a gentle fertilizer, such as a seaweed/fish emulsion liquid, and be careful to not overwater (probably not a problem in western Idaho!). They may recover, but you may want to purchase seedlings from a greenhouse as a backup plan. One way to avoid sunscald next season is to "harden-off" the seedlings, exposing to the elements over the course of a week, increasing their time outside day by day. Start them off in a location sheltered from strong wind and sun, and gradually move them towards their ultimate destination, ending by leaving them out over night. This should condition them to the outside world and get them in shape to perform!
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