what i meant was that you will get root/stem rot if the rockwool cube is too wet UNLESS you are using highly oxygenated water(such as in a dwc system with airstones in teh water). if your cube is not in this environment(such as just when you put a seed in it and water) the cube MUST NOT be more than about 30 grams at any given time(i am able to know just by holding it...but i am used to my rockwool cubes). if the cube weighs over 30 grams it is holding too much water and you will get rot, fungus, or other excessively moist problems. as for the water "slinging" thing...totally neccesary with rockwool cubes because if you squeeze them you lose the air pockets that are blown into the rockwool when it is spun. it's just a flick of the wrist to "sling" out excess water. hope i've helped ya out a bit. gotta take care of the locals