Open by appntmnt and no one allowed in the store. That's more than reasonable .... and considerate for all parties.
For those working on the repair side, consider what you are exposing yourselves to with the dust particles in these vacs. That's why cleaning them out OUTDOORS is preferred. Let any dust particles or germs float away. You don't want to be breathing that.
At least have a strong vent fan at an indoor work station that takes the dust directly from the cleaner area and vents outside. Not something that is just in the room on the ceiling somewhere.
