2 years without dusting? I never dust. That's woman's work isn't it? (Attempted big smileys while ducking to avoid low-flying cans of Pledge, Mr. Sheen etc)
I am conducting a similar dust-etc-related experiment in my car, and it's a lot less than 4 years I can tell you. As a smoker, the last car maxed out after about 18 months. Projected time on my current car, which I've only had 3 months, and as a now non-smoker, is quite a lot longer.
Now, if you'll excuse me I must finish the washing up and hoover through. and that rubbish isn't going to put itself out either....