I wonder about how much needs to be printed out? I've just been printing out a "nozzle check" (hold down the pic [button] of paper while powering up on the WF1100) about once a week, but was thinking that if the ink itself might begin to separate or anything when I'm only printing such a small amount.You are correct about the ink drying out. Best way to prevent that is to print something once a week or at least that's what cobra ink recommends.