there are many much more troublesome compounds thanpepper spray that come from a store or under a kitchen sink apparantly noone has used this concept yet but what happens when the pepper spray is all gone but there is plenty of glycerin and sodium bisulphate as an example?

found this as well.

https://www.popularmechanics.com/science/health/a28904691/ho...

https://news.ycombinator.com/item?id=20873675

https://www.youtube.com/watch?v=7oAcT4Duun4