Bake at home kits should always be kept frozen. Take them out the night before you want to bake them, and assemble on a sheet pan from frozen. Allow ample space between each croissant (2-3 inches). Wrap the tray in plastic wrap or foil so they do not dry out and let them proof at room temperature overnight. You can brush with egg wash (1 egg yolk + 2 TBSP milk) but it's not necessary right before baking. Bake at 375 F until golden brown, check at 15 minutes depending on your oven but will usually be done around 20. If you think they need more time, set a timer for 3 minute increments.