My Mum is show house clean. I grew up in it, it's a toxic environment for a child!
Things she used to do:
Put plastic down on light coloured carpets and chairs and whip them off when guests came to visit. We were not allowed to speak of the plastic to anyone.
We were only allowed to eat and drink in the kitchen day to day, no drinks beyond the kitchen door and only allowed snacks at the kitchen table.
Hobbies/ toys existed only in our rooms, subsequently we spent a lot of time in our rooms as kids and didn't socialize as a family in the evenings.
Mum did multiple washes a day so there was never dirty clothes in the hampers and would iron until it was done each night.. sometimes she'd be ironing at midnight in the kitchen.
We had rooms in our house we were not allowed to enter as kids: the living room and the dining room being the main ones. We were allowed in our rooms, the kitchen and the snug only. We only ever saw the inside of our parents room on our Birthdays and only saw the dining room at Christmas. As a child I never once sat down in the lounge. Even now when we visit Mum she winces when we have cups of tea in there 
Guests were never allowed in the snug, it was just off the kitchen so I think most people thought it was a pantry! We had a TV, Xbox and books in there but she still went mad if it ever had anything out of place.
As for cleaning, we were never involved. She would get in from work at 7pm and then would none-stop clean until long after we were in bed. I still don't know what she did, it wasn't a big house!
As a result of this, as a teen and young adult I was horrendously messy. Never did any cleaning because I'd never been taught how! I think it was a rebellion too. Only recently have I cleaned up my act and got my house in order!
Life is too short to have a show home house, especially if you have kids.