I kind of have the opposite problem.
I have this nasty tendency to remember the most spoilery spoilers* many years after having just briefly skimmed over someone's random review/commentary paragraph which mentions in passing that X married Y instead of Z, or the murderer was A and they offed B and C but not D who was instead killed by E who tried to pass it off as one of A's, or M turned out to be N's secret love-child with O and was totally relieved not to actually be related to half-sibling L whom they'd been in love with all this time.
I don't even bother to read reviews or look up what-is-this-story-about synopses for certain types of books any more.
* For some reason, it only works for the details that will totally mess up the how-will-it-turn-out mystery/tension when first reading a story, and not for incidental things like so-and-so was educated at ASDF College and was on the competitive rowing team which is the source of their deep-seated rivalry with such-and-such from JKJK House who was also on the opposing competitive rowing team and the reason why they continually snipe at each other, as finally revealed in an amusing anecdote in issue #123 after readers wrote in and asked why couldn't they all just get along?