Would you trust him to water a cotton pad sitting between the water-holding 1020 tray and your cells, pots or flats? If your seedling mix wicks well enough, that's easier than top-spritzing and it discourages damping-off by keeping the surface drier..
Flannel or terrycloth under the cells can assure that any remaining water in the tray is shared equally. Any over-watered, waterlogged cell will drain out faster than it would without the pad.
http://garden.org/ideas/view/R...
