We recently added 3 older kids to our family and so I have very fresh experience with establishing routines, hygiene habits, chores etc. We started out with a job wheel, rotating every time we did chores, but as someone else said I could never remember who should do what and it was way too much for me. So now they have pretty much permanent daily jobs, until they outgrow them or someone else grows into them. Every Sunday we have a house cleanup time and then we all do our jobs at the same time, with me judiciously dividing up the work and the older ones helping younger with their tasks as needed. Dishes chores are in teams of a washer and a rinser, and the youngest is the table setter and silverware putter-awayer. I recently had the brainstorm of using the calendar instead of a chart, or memory, to determine whose turn it is to wash or rinse. So one always washes on odd days and one on even etc. This could also work for other chores if two kids are rotating. This has eliminated tons of arguing over whose turn it is! It definitely helps if your current kids are with the program when the new ones arrive, but I try not to be too wedded to that idea because it puts such a burden on the "old" kids to be models for the new. And invariably they balk and become less "model" when the new ones arrive anyway. Our latest additions (7,10,12) came straight from their birth home, with NO experience of chores, sanitation etc! It has required long and diligent effort on my part, but now after 8 months they are pretty cooperative with chores, even make their beds, can clean up their rooms before bed, remember on their own to brush their teeth (sometimes), and best of all .. use toilet paper!!!
though not all the time. My best advice is to keep plugging away at it all and remind yourself daily that progress will happen, even if very slowly.