• If you do not have Vaseline, then simply use a double-sided tape as a substitute. It will also attract the dust particles from the air.
• If you do not have a one week time, then you can also perform this simple experiment right on the spot. All you have to do is, take a wooden stick and place a piece of double-sided tape at its tip. Now, fix it somewhere for few hours. Count the number of dust particles attached to it.