The fastest way to clean a model from the dust is:
1) disable it
2) take several dirty socks (thick, cotton socks) which you want to put in the washing machine
3) pull socks to the other side of the material
4) put some bricks inside
5) tie the socks strong (this is the most important moment, if the bricks fall out, you may damage the washing machine!)
6) and put them into the washing machine
7) set the temperature to 30 Celsius degrees add washing powder and the rest of the dirty clothes
8) turn on the washing machine
9) wait about 40 minutes
10) viola! you have now clean clothes, socks and bricks!