I do the changeover day for a two bed holiday cottage. My routine is ..
Open all windows.
Strip beds, put in washer. I add a capful if diluted zoflora to washer. (At home I wash bedding and towels weekly).
When bedding finished, put towels in washer, put bedding in tumbler.
Empty all bins.
Spray the inside of the oven door and the floor tray. I like cif oven cleaner as it doesn't stink. Leave to work while wiping over the kitchen worktops, table/chairs and appliances. I use diluted zoflora with a micro fibre cloth, warm water. Clean down hob and oven.
Highlevel dusting, horizontal dusting, low level dusting. I use a feather duster then go round with my polish and cloth duster. Wiping off tv controls, lightswitches, lamps, light fittings.
Move furniture to hoover underneath, I pull off the main sofa cushions to do under those, areas you can't see but make a difference and keep sofas looking nicer for longer.
Before heading upstairs I spray mop the downstairs.
Make beds. Put clean towels out.
Clean bathroom. I use white vinegar spray with kitchen roll. It removes water marks so no buffing needed. Spray mop the floor.
Mirrors done with white vinegar.
Wipe over inside windows with white vinegar.
Hoover stairs and upstairs.
I also wash windows outside and do the lawns.