I taught a First Aid class once at a summer camp, and I’m involved in the medical field. “Show” can also be interpreted by demonstrating without doing.
Pretend it is a scenario at a First Aid rally, if your district has those. Anyone can be a victim, a parent, sibling, etc. For a snake bite on the leg, you wouldn’t actually wash the bite, you would grab the supplies needed then say and do something like:
Rescuer tells the victim sit-up and prepares for the treatment. They physically set up their water bottle, some kind of cloth, and soap.
Rescuer verbally or physically applies their PPE (gloves, imaginary if needed) then starts their treatment. This is where they can demonstrate with out actually doing it.
Rescuer: “I’m going to take the water bottle and get the cloth wet then soapy.”
(They do so without actually doing it, but instead demonstrates)
Rescuer: “Now, I’m going to tell the victim what I am doing and start to wash the bite.”
(Demonstrates cleaning the bite)
Then so and so on.
I hope I explained this well, I can’t think of any other way by typing. They basically demonstrate everything without actually using the soap and water.