You only want the cubes to be damp, not soaking.. I have in past let em go dry(but was still listing the Leaves twice a day and letting em breath) after about a week to 10 days I used to remove Dome for longer and longer periods,keeping an eye on em for wilting, then Dome straight back on em.. Once they stand on own without Dome You are Good to go.. Some peeps put Cubes on a bed of Perlite and keep the Perlite Damp.. Hope this is of some help.
atb