Humidifier hiccup

Load your pots with plenty enough water. Don’t worry RH will raise by itself when plants grows.

fat as f@ck or two bathroom big towels on cloth hangers will humidify for 12 hours 2x2m tent to 70% rh, soak them twice daily, wash them in washing machine every second day ( prevention from mold) and all will be under control find your amount, if you need small raise, put one smaller towell not soaked totally, better not far from fan.

From what I can see you have 49% without spraying pretty well in your flowering stage you don't need to raise more, as you enter deep in the flowering stage the less humidity you need 🍻

Si deseas puedes colgar paños húmedos o colocar cubetas de agua dentro del cuarto de cultivo. La humedad un poco más baja no traerá problemas.

You want about 40 in flowering. Nothing lower then 30. Nothing above 70. That is inviting issues.

You are doing right by spraying. You say your rh is 18w?? 40s? 30s? I'm confused. At the start of flower you will get away with 40 and later in flower 40 is golden. Othrr ways are leaving open containers with water to evaporate Hang wet towels in the tent. Try lower the temps so rh goes up and aim for a good vpd. Find out the tell tale symptoms of low humidity and watch out for it . The fan sucks the air out and sucks in so if the room it sucks air from is dry then tent will be. Maybe lower or turn off fan in the tent. Find out which is drier. Room or tent and work it from there