I've noticed that when I use one deck exclusively for a while -- several weeks to several months; I'm not sure what it depends on -- it starts giving me answers that don't make sense. That is, the cards that I turn up don't relate at all to the question asked. It's something I've read about as well, and I've forgotten where. What I've done so far is to set that deck aside and use another for a while. At the moment all five of my decks are being problematical. I'm thinking of buying a couple of new ones, but I really shouldn't spend the money. Any suggestions?