Library Book Pet Peeve

I love libraries. We are a reading family and there is no way I could afford to buy all the books we read. BUT, I have a huge pet peeve. The last two books I have checked out have been DISGUSTINGLY dirty. Food, snot, bugs, etc. It is super yucky. This last book even smells like gasoline. What are people doing?!? I am really liking my newest book, but every time I turn the page, I am nervous about what "surprise" I am going to find in the pages. Come on people -these are not your books to trash! Some of us want to be able to enjoy a book without feeling like we need a tetanus shot.