"these days started to be very hot with temperatures above 37ºC, every morning when I get up I go and throw water on it. If possible I use sprinklers to water the plant but with a plastic bottle, I especially try to water the leaves and not flood the stem"

That is a perfect recipe for growing mold and destroying your crop. I would recommend doing the exact opposite. Do NOT water during the heat of the day. And do NOT water the leaves, water the roots.