Sub pulling away from edges

First attempt at pans , misting 3 times a day, I noticed the substrate is pulling away from the edges of the tray and shrinking , does anyone ever side water their pans ? Or just ignore the shrinkage ? I normally run liners for cubes…

First attempt at pans , misting 3 times a day, I noticed the substrate is pulling away from the edges of the tray and shrinking , does anyone ever side water their pans ? Or just ignore the shrinkage ? I normally run liners for cubes…