No don't let the inside of the dome get too wet because that will cause little magnifying glasses (water drops) to burn away at ur plant. I'm new to cloning too and my 2nd clone had this problem... it has a brown spot burned in 1 of the leaves.

I don't know why someone suggested to keep the cubes moist but not wet. I heard you need to give clones TONS of water as they do not have roots to hold the water in.

Here's what I do, I get bowl w/ a flat bottom and place my rockwool cube in there along w/ about 1/4" of water. Spray the cube and the plant if it's transpirating too fast. Then put it in natural sun w/ a coca cola (clear) 2L bottle cut in half and placed over it.

The son will vaporize the water in the bowl and cause constant humidity to keep the plant fresh and the water in the bottom will also feed as a reservoir for the rockwool to suck up water from to make it dry out WAY slower.

Whenever the cola bottle gets too many water drops on it... take it off and whip it dry... this will give a chance for the plants to breathe fresh air (but not too much time is needed)

If your plants are staying "moist" enough then they will turn extra green (more so than a normal canabis plant)

Then at night time, bring it inside under your lamp.

This is what I do and for the 1st time my clones have lasted 3 nights and 4 days...