Unfortunately many examples show how it works. even if you install C or D type IBC or BigBag you may change it to ignition source cleaning with a dry clothing.

https://www.youtube.com/watch?v=gzzA-JOu9Lk&sns=em

Hazardous area competence helps you to understand the surrounding.

+more example: Ex light fittings with Ex type certification

in many cases polycarbonat housing with one sentence on it: clean with wet clothing... it does not mean the manufacturer was not careful enough, he make you prepared that way what may happen if not...