I believe our anaesthetists wish to remove the plastic bag after every Covid operation replace it with a clean one without cleaning what was covered by the plastic bag, i.e ventilator controls, vapouriser., etc

In my opinion laziness as the operating room will take approx 1.5 hrs to clean if used for a Covid-19 patient.

No, we do not have the money to have two anaesthesia machines in one OR room, lucky to have one. As I assume like other countries anaesthesia machines are not replaced unless the manufacturer discontinues that machine, hence some of our machines are 15 years old.
Yes our anaesthetic techs clean the machine in between cases but that is usually a quick wipe down 30 secs or no more that a minute.