Newbie in need of help!! Auto blue leaf curl

Hi everyone so my first time here my first grow auto blue prymaid just the one litlle girl 4gallon fabric pot biobiz all mix using a 600w hid running at only 250 w now, she's 2 weeks old today and noticed a lot of upwards leaf curl so I've uped my lights to avoid over heating I'm running an exhaust kit and ocalating fans temp is good got a good flow of fresh air watering with ph water at 6.8 roughly every 2/3 days depending on how dry soil is been a few days now and shes still growing great, I think lol but still getting slight curl any help would be greatly appreciated tia

Also been struggling with humidity being around 20/30 even after buying a small mist humidifier and doing the usual wet towel tricks. .

You need to get the Humidity Up for sure
I have used buckets of water in the room to do so

Your lights could have been too close or your box is too hot
are you over 80 degs F?

Other then that it looks fine

Thanks for reply yeah I thought it was rh I've managed to get up in to the 40s now looks like that will be the highest I can go I've uped my lights again to make sure n yeah temp has been good around 78-82ish I've turned the exracter up hopefully lower it by a few more degrees and see how she gets on

Just buy a better humidifier it's worth it. But I rarely have this problem but I also run led temps never above 75 and down to 64 at night