[CUBE] Scorch Marks?

[Riba]

> At the moment i was thinking it may be due to dust deposits? (which 
> could be making things apear worse), my girlfriend smokes like a 
> trooper & is always smoking near my Cube (no matter how many times i 
> tell her...) could this play a part in it?, or should i be thinking of 
> getting a fan installed ASAP?

No need to worry. Those are just fine dust particles, and they are 
usually brown if there is a smoker in vicinity.