when I use rockwool...I presoak in ph'd ROwater, when I get ready to put seed in, I take starter cube and shake out like you would a paintbrush... freely, so as to unsoak the cube...this will leave it wet. It takes tending to, but I believe best results will be achieved if you lightly mist several times a day to just keep the top damp...the bottom will take care of it self if you keep up consistency...Imho :twocents: lw