The window vac that clears your cab before you drive

The Kärcher window vac's official job is windows. Its real job is sucking the overnight condensation off the inside of the cab glass in about a minute, so the morning drive starts with clear screens instead of ten minutes of demisting and a damp sleeve. It also dries the shower walls and tray after use, which keeps the bathroom from developing that permanent-drizzle smell. The Dyson handles the floors (sand, gravel, dog, crumbs) without dragging a cable round the habitation area.