What about scenarios where equipment may be cleaned externally, for example after a spillage, but the fluid works its way inside the equipment without the operator being aware. Of course, only when the technician asked to look at the equipment opens it up does the problem then become apparent - at which point there's exposure. This can only be dealt with at service or repair - precautions probably always need to be taken if there's a risk of this scenario but I doubt they are in the majority of departments.
Some MHRA guidance has actually suggested that internal filters, fans, etc, on ventilators/respiratory therapy equipment be cleaned on a regular basis, by those technically qualified to access them, to minimise the potential for patients and staff being exposed to MRSA-like infection or other airborne contaminants in dust. This is a service issue and one that, unless there's facilities to handle potentially comntaminated dust and particles, can affect everyone in a workshop.
I'm inclined to agree with techman but the facilities need to be provided to enable tecchnicians that are trained and knowledgeable to do this safely without putting anybody else at risk of exposure to potentially harmful substances.
