I am speaking generally here and I do not have experience with your long hot growing seasons.
But generally, spraying or misting is not great for vegetables. It is harmful really.cNor is just giving them wee daily sips of water. Shallow watering encourages weak and shallow roots. If you water deep and infrequently it encourages the roots to go deep and strong.
If your peppers are wilting after just one day of no water, this is a sign that they are not resilient, and just a little stress makes them start to fall over. Seriously, frequent watering is the number one killer of all plants and the number one most common mistake people make. You can google this.
Stop spraying your poor plants daily right now. You may have already killed them with your keeping moist approach, which will kill many plants. It is ok for them to dry out. THINK for a minute. Research where most vegetables thrive naturally. Is it in sub-tropical conditions? NO. Most vegetables we grow in the US originated and thrive in desert or Mediterranean conditions. Which tends to be very dry.
I do not understand where this "constantly moist" notion even came from? It is so common...but you would think common sense would prevail, especially with the internet. Common sense isn't that common, apparently.
OH. Mulch. Google your region + mulch. I use straw mainly. This is not a difficult thing to figure out depending on your region.