Then there are the things hosts don’t give any instructions for, because it never occurred to them (quite understandably) that anyone would require instructions to use.
I had a guest who told me she was having to flush the guest room toilet 2 or 3 times to get everything flushed (this when there is a water shortage in my area and we all need to conserve water). I said that was weird, as it was working fine before she arrived but that I’d check it out. But then she said she’d been holding the handle down for a few seconds when flushing because that’s what she had to do at home with her toilet.
I explained to her that means that either her toilet at home doesn’t have the float or flapper chain properly adjusted or the flush holes are plugged, and to not hold the handle down when she flushes here. After that, she had no problem getting it to fully flush the first time.