There is indeed an issue with regard the control of substances hazardous to health. Sounds odd for an organisation that gives you a rifle, ammunition, explosives and daggers to play with in an environment laced with Novichok, radioactive and/or biological toxins, whilst another bloke tries to kill you with a pointy stick, but it is factually correct. The reason is not as many may imagine ("bleach tastes yucky and is a bit smelly"), but simply because the cleaning compounds used by the contracted companies have to be chemically compatible. And, so I'm told, bleach actually reacts violently with the dolphin-friendly products used by the cleaning company ...and is therefore not approved. Strange, but true. Luxury. We just ate cold, wet gravel.