Nah, my mum doesn't work. This house is spotless (The dust guard on my case has yet to gather any dust) Even so, i still clean it regularly. It's just a small glitch that's all, it may even by a firmware/software glitch or windows itself.
I have given up on the war on dust my house was built in 1730 and essentially the building hasn't changed although furniture has. The amount of dust is insane I last cleaned my dust filters on my lian li case 2 weeks ago and its already starting to backup past the grill so that you can wipe it off with your hand.
One fun aspect is the window glass is really thin and shouting loudly or playing music loudly occasionally cracks or breaks a window. With my 12.2 speakers on my computer I think everyone of my windows has been replaced with newer thicker glass within the last 2 years thats 20 individual glass panes.