rockwool drying out

I have a problem my rockwool cubes are drying up really fast I have 3 sitting in a container under 3 23w clfs with temps at 23 degrees Celsius and humidity at 58 % my seeds have only been in 12 hours and I soaked the rockwool for 24 hours in phd water then put germinated seeds in I checked on them and they where pretty dry so I put a little bit of phd water on them did mess up

Did I

no problem....they need to be moist, just not soaking wet

Water them as often as necessary. Little cubes only hold a little water so you will need to water them.