Article usage in a bulleted list

Can you please help me, I’m writing an instruction for an elevator in order to do an exercise, and I have a question about article usage. I can’t decide if I should use “the elevator” throughout the whole document of if it would be better to use “an elevator” each time a new section or a list item begins.

Here is a bulletin list for example.

Please follow these recommendation when using an elevator:

• Do not jump inside an elevator. The elevator may stuck because of it.
• Do not rush into an elevator.
• Do not smoke inside an elevator.
• etc.

From my understanding if I were to say “Do not smoke in the elevator” it would mean “the elevator you are in at the given moment” or “the elevator this instruction is written for”. When “an elevator” means “any elevator you might be in”.

Is it so? And which article will be a better or more common usage in this case?

Thank you!