Well she seems to be worse if she's in the night air for just 5 minutes. I avoided having her outside all day.... Til I burnt the oil when cooking dinner & had to open the house up!

Yet DD1's asthma improves with night air...

If thats the only reason the steam thing stopped I'm gonna try it. I usually put mine in a shower with some eucalyptus oil. Steams them up good, warms them up & loosens any gunk in their nose & chests for sleep.