One of the best reasons why it's good to clean as the day goes by, is that you get some of the chores out of the way, and you're not stuck rushing and trying to get everything done at the end of the night when you're tired and grumpy and you want to go home.
Now that you have recent first-hand experience, from doing it yourself last night, you have a great window of opportunity to emphasise that to your employees as you show them how you want things done. They'll see that you realize that it's a lot of work, but they'll understand that it all needs to be done and done right.
The other night I got "fooled" when I started early, and got the floors swept, and all of the tables wiped down, and then a huge family with lots of kids came in (and spread out) and messed up four tables at once...plus the little brats dropped cookies, etc. all over the floor. I wasn't happy about having to clean it all again, but those things happen. I'd feel better about it if they left me a decent tip, but that rarely happens!
Rose