Tips on establishing a bedtime routine for an 18 month old?

Alana • Married | TTC #3 w/ APS | Mommy to 1 girl 👧🏼 & 1 boy 👦🏼 & 3 angels 👼🏼 |

Lately she just doesn't nap and stays up till like 11 or 12. My husband and I need some alone time. Any ideas on what to do to get them sleepy? Does sleepy bath stuff work? Etc. Best bed times?