Nessie.....you slash before it bakes? My loaves are still dense....I'm in Florida at sea level which is messin with me I think.
Dense = needs more water. You need 70% Hydration for your flour. .Example … you have 500 grams of flour..you need 350 grams of water.
Slash Is like noted above…3/4 inch deep…don’t be scared to slice it good !