Dust (as it is dusty) can cause respiratory irritation. I'm not sure how you can fix it though...
Don't feel bad! Even owners that have tons of toys for their rats are nowhere near a perfect owner!Me either =( Makes me feel bad because I want to give them perfect lives.
Thinking I shouldn't let them out to play in my room due to the dust under the bed etc.
I think I might look into one of those. It wouldn't do me any harm either to have less dust.You could try using an air purifier?