Although I'm not renowned for my love of housework (!), each house we've left I have cleaned scrupulously from top to bottom.
I always leave instructions/manuals for any household equipment; a full loo roll and a spare, and working lightbulbs in all fittings. I also leave them a 'House Book' with details of room measurements, how much paint, wallpaper and curtain fabric is needed for each room etc. Details of how to operate the heating and burglar alarm etc. If they were moving from out of borough I also told them where to find the local recycling centre, hospital and doctor's practice. All of this was left in the kitchen with a welcome card and a bottle of wine.
No one has ever reciprocated for any house we have moved into. The first house we ever lived in was 'acceptably' clean but smelled, we later discovered it was damp and mold behind the wallpaper.
Our second house had not been lived in for several years. The seller (a single man) appeared to have vacuumed but didn't clean the bathroom, the cooker or the kitchen cupboards, and several lights were faulty.
When we moved to our present house we booked into a B&B for a week before moving our furniture in so we could repaint some rooms - I couldn't live with a brown living room and leaf green kitchen! I'm so glad we did as every room needed a thorough clean and repairs done. The built in cooker was unbelievably dirty and broken, cabinet doors were falling off and three radiators were rusty and leaking. I cleaned the bathroom twice but still couldn't get the brown stains out the toilet, and the shower didn't work! It was a very busy week and I began to wonder if we'd done the right thing in moving here. But we could see the funny side of it and had a lot of fun and laughs making it liveable.