Up end Mattresses to allow air to circulate especially if on a wooden bed base, roll up any rugs place on a sofa or such like. Put moth bally things in sinks/basins. Air Freshner blocks in wardrobes and in rooms. TURN OFF ALL WATER SUPPLIES AND ELECTRIC at the MAINS.
Ideally cover soft furnishings with Dust Sheets. Make sure all windows are securely closed/locked pull curtains across so that nobody can see into property!! Finally lock doors and leave a Key with someone Trustworthy in case of a problem
