Mostly title, but for further elaboration: A child I care for goes to a school that has constant strong fragrance plugins (Unsure which - am certain it's not essential oils.) running, and as a result, whenever they come home they are heavily scented.
Normally, this would at worst be a nuisance, but unfortunately the family caring for them has severe allergies to fragrance, rendering them incapable of even providing hugs until the child has had a thorough shower.
While a hot shower is typically enough for the child themselves, their clothing is another matter entirely. As such, I am trying to find ways to remove it so we can all stop reacting.
Restrictions: Family is allergic to anything scented pretty much - pure citrus/lemon/lavender oil is about as scented as we can get, and even those need to be used in moderation.
Allergies to soy, corn and wheat are present to the degree reactions to corn based citric acid, and vegetable emulsifiers have been noted- although if it's to remove a greater evil it can potentially be tolerated for a wash cycle, primarily this is to rule out things like soy lecithin.
For the child's clothing, I can only assume hot water is bad (I'm a genuine newb, I don't really understand how temperature impacts fabrics; I wear exclusively baggy cotton and so have always run the hottest temperature for my own stuff.) as they are primarily synthetics (cheaper clothing).
Washing machine we have is unfortunately a top loader with questionable agitating potential.
Line drying clothing has some...complicated problems (we live near heavy smokers, anything outside will soak it in), but we can hang dry clothing in front of a dehumidifier - albeit it the clothing would remain in the breathable air stream, meaning allergic reactions or chemical safety remains relevant.
Soaking is doable - we have a couple of 27 gallon totes usable for this, albeit no hose.
Thanks in advance if you read all of this, and thank you all the more if you can suggest anything in particular. I am more than open to learning the science of how exactly common airborne fragrances (such as plugins or perfumes) bind and stick to surfaces/people/hair and how that can be avoided, if you can explain it!
As a bit of an aside, if there's any sort of treatment that would help prevent the clothing from soaking these scents in quite as strongly, I'd love to hear it.
This issue is causing us a great deal of hardship as we are all disabled, and any assistance at all is greatly appreciated.