Leave all dirty clothes spread around on the floor
Cook some bacon, leaving spattered grease on hob
Use ALL the bread, but leave one heel in pack but do not seal it
Move her tweezers
Use her best perfume and leave it under the bed (by the wall)
Brush your teeth at the mirror, leaving spatters all over it
move everything round in the wardrobe when looking for something
Leave bath/ shower with soap scum and grease rim
Leave shower setting at cold
Leave ALL recycling on kitchen counter (it's in transit, but never reaches the recycling bin)
Leave soap with weird streaks and hairs stuck to it
leave ONE lonely bit of toilet paper on the roll (and no refill within reach)
Leave crumbs and butter globs all over every kitchen surface
Finish the cereal, but leave the box in the cupboard
Leave your wet towels hidden till the smell helps her locate them
Take lots of selfies (with the dirty, messy flat in view) to send her