N.J.
Don't use any fans- they stir up dust. This is key- for my dd's first 2 yrs we used fans for white noise. Now after 3 weeks w/out one- no runny/stuff nose- at all! I use a vaporizer in my dd's room. I also spray her nose w/ Xylitol nose spray- it coats the mucus lining so allergens won't stick. If she gets a hint of a stuff nose- I give her Rescon GG- it is OTC but they keep it behind the counter- it has Guafinisen which breaks up the mucus w/out side effects.