text: My Salter scale won't stay on 0 before I start weighing. - Fixya
  My Salter scale won't stay on 0 before I start weighing.
  When I set my Salter scale to zero grams, before I start weighing anything, the numbers start going up, about one per second. I replaced the battery and, following advice I'd seen elsewhere, left the battery out for a couple of hours, but still have this problem.