Originally Posted by
Tartarus I don’t agree.
As with every product, stuff need to be trial and errored before finding a cause.
The Genius Bar is the best place to have that done.
A genius is a person who displays exceptional intellectual ability, creative productivity, universality in genres or originality, typically to a degree that is associated with the achievement of new advances in a domain of knowledge.
(source
https://en.wikipedia.org/wiki/Genius)
Again, if that's the case, then that place in the Apple store you take your device to be looked at / worked on needs to be renamed. Once you've reached "genius", all the trial and error has been done for quite some time.