Hey there! It looks like you have a little bit of over watering going on there. So your on the right track by letting them drying out. a good trick that helps prevent over watering is once they are dry feel the weight and take a mental note. Then after you give it a watering feel the weight again take a mental note so now you know if it isn't at or close to the dry weight then it shouldn't need watering.Also what distance is your light, those couple spots look like they could possibly be from light burn but the only odd part is the others are fine. they may have had a drops or 2 of water on them and it could have acted like a magnifying glass and burnt the leaf I don't know. As long as the new growth does not show any signs of that I think you should be fine just make sure no other plants are showing the same signs as well just to be safe👍 Keep up the great work. Hope this helps Happy Growing an Plentiful harvests🙏