I am saying that only spraying them down like that makes it a bitch to determine if they are too dry or too wet. The top of the soil shouldn't be constantly wet. The rest of the soil shouldn't be constantly dry.
It is common for people to have this fear of over-watering, which causes them to under-water or do things like this. Over-watering happens when the soil is sopping wet constantly; from improperly draining or water logged soil or from the containers sitting in stagnant water. Water hasn't very much dissolved oxygen in it, and plant roots breath oxygen. Any oxygen in the water will be quickly depleted by the roots and by aerobic microbes, so the roots literally 'drown', unless there is an air pump bubbling that water and replenishing the oxygen. With no oxygen in the medium the door is open to anaerobic (mostly very nasty) microbes to proliferate and the potential that the plant will acquire a disease is increased.
You want a proper cycle of watering. You water sufficiently, until the mix is entirely drenched and you get some run-off. Then you wait until the top inch or two (depending on container size) has mostly dried up, and you water again.
You need to stick your finger down into a container and feel how deep the moisture goes. If your medium started off wet and you continue to spray the top of it, chances are it will remain thoroughly wet. If you allowed it to dry out and then began to continuously spray the top of the soil, then the soil at the bottom of the container could be quite dry.
You can spray the plants or foliar feed once or twice a day (at lights on/off), but just water normally as I described and don't spray the soil to saturate it like that.
