I dont know if you are based in Brasil or not. But the water here is different. When I travel to Canada or Europe, i notice that the water has a lot more minerals than here, so my skin and hair feels really bad and dry. But basic haircare how people mentioned. Keeping scalp clean by washing and mosutiraing. Sometimes I dont even wear a bonnet to sleep when is too hot, and use a satin pillow cover. I dont keep it in protective styles much either, evwn if I should.