Sex is becoming routine

Help! I’m trying to find the time to dress up in lingerie more for when my husband and I are going to have sex, like to wear certain outfits and stuff be sexier before we do it versus being in just a t shirt and shorts but we never seem to find the time to have a planned romantic night where I can dress up before. We just always seem to do it randomly and when I’m not dressed up “sexy” and that’s fine for a lot of times but I feel it’s not as spicy as it used to be... any advice ? :/