Every sofa has a story: tea rings from late-night telly, a smear of ice cream that beat the spoon, that faint shadow where the dog decided the rules ...

Plastic jugs stacking under the sink. Skin getting itchy after a “spring meadow” wash. Prices creeping up with every shop.

You scrub the counters, vacuum the floors, and wipe down the obvious surfaces. But even the most dedicated cleaners miss some ...