Homelessness: the smell of it
Most people living on the streets and sleeping hard are more prone to come up with ideas to develop green cleaning supplies compared to their housed peers. Back in 2006, when I myself was living out of a van for a month, developed and honed skill sets I'd only prior thought of. Between the dishes and cleaning a grill, breaking down 'camp' became easier over a matter of days.
When you're 'on the asphalt' you tend to simplify things as much as possible.
When I look at people on the streets I usually don't get 'grossed out'. Many unsheltered residents while looking disheveled and needing a bath often 'do' maintain hygiene 'where it counts'. Without it, they'd be in hospitals for various infections. You'd see it in their gates more when they walk if there were sores on their feet, armpits, or crotch.
The main thing people associate with the homeless is the odor of repeated sweat from the same clothes worn for days. While agencies continuously increase other services, they often also increase staff which takes away from improving delivery of more basic and vital needs.
What every community needs amounts to safe sleeping areas, meals, showers, and laundry facilities. In the end there will always be homelessness, but how much of a stink people have to put up with can amount to what they actually invest to begin with...why...and where.