I actually have never had access to a teleprompter. When public speaking, I try to memorize enough to speak without notes. Sometimes I have notes, but I try no to use them. I think you are more likely to screw up if you have to depend on notes. Trump is an example. He projects and is a good public speaker, but when he has to read off something, it’s not as good. He should stick to his strengths.
[I actually have never had access to a teleprompter.]
It is rather difficult to use a teleprompter, especially if it is scrolling faster than your reading ability (and if you have vision problems)
Trump doesn’t use a teleprompter.