Ecoquest Breeze AT (by 2 users)

I cleaned my unit a week ago, removed the plate inside and replaced it with a spare I had. When I put everything back together, the unit run just fine, however, it appears there is a problem with the unit, because I do not get the clean air smell in my house. I am not sure if this is a lack of ionization or another problem and I have no idea if something on the unit needs to be replaced or repaired. Any suggestions would be greatly appreciated.