help please !!!!! plants shrivelling up

Hi guys i started my first grow on sat 6 sweet cheese cuttings 24 days old in my cupboardunder a 600w hps,i planned on vegging them for 2 weeks on 18/6 and then switching them,everything was fine but when i checked them this morning before work 4 of them looked as though they were shrivelling up and dying,1 more so than the others,i really want to try and save them i watered them straight away but it doesnt seem to have done anything,my humidity in there is only about 5% could this be the problem? Any advice is greatly appreciated

Need to post some pics so we can better help

what are your temps at

Your Humidity is only 5%??? Are you sure about this? I used to live in Las vegas where the outdoor humidity was between 3%-18%, but you would still have about 30%++ inside your house because of Breathing, Dishes, toilet, showers and other things. 5% humidity will pretty much suck the moisture right out of your plant. especially if you have temps in the 90's.

Thanks for the input guys,i dont know what my temps are til tomorrow as my thermometer broke and i need to get another,and yes humidity while my light is on is between 0-5% and around 30% when the lights are off,do u guys know of anyway i can create humidity in there until i can get a humidifier

Ive tried but my phone wont upload it and i cant get to a pc

Put shallow tubs of water around the room. The more surface area you have for the water, the better it will evaporate. Make sure to get a humidifier that does not put off a lot of heat.

With out pics it sounds like root bound containers.....

do you have pic messaging, send it to your email. we need pic to really pinpoint the problem