A few ideas (try one at first or an easy-to-maintain combo. Remember the adage, “tweak it till it works.”
Delay alcohol if you haven’t already
Add some exercise? Nothing intense to start and do something you sorta enjoy.
Extend your window a couple of days a week (20-4)
Do one extended fast (maybe 5:2 for a week). Modify fasts if it helps make it easier.
Take an honest stock of the types of food you eat during your window: if you’re indulging in some highly processed/high sugar/white carbs maybe ease up. See what of the above may need to be kept in check just a bit more. (If you’re already eating clean, then you got this!)
Mix up your windows a bit to keep your body “guessing,” which sometimes helps.