An inquest is set to resume today into the death of multi-millionairess Eva Rausing.
The 48-year-old was found dead in July at the five-storey Chelsea home she shared with her husband Hans, heir to the Tetra Pak fortune and one of Britain's richest men.
Police discovered the mother-of-four's body in an advanced state of decomposition after they arrested her husband on suspicion of driving under the influence of alcohol or drugs on July 9.
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Industrial vacuum cleaners and magnetic wands will be used each night during the summer to remove metal particles, dust, oil and grease.
Detective Superintendent Fiona McCormack said the Hotpoint FF175BP model had not been subject to any product recall.
Security for this year's event on July 8 has been reviewed following a spate of terror attacks in the capital.