The battery on your remote control doesn’t work anymore, but don’t throw them out just yet. You can squeeze more juice from it and use it for a few more days. Here’s how to do it: Remove batteries and rub the contact points (both ends) with a pencil eraser. Blow away debris then reinsert. The moisture from the air are causing the metal contacts to tarnish and corrode over time. But the friction created by rubbing the contacts with eraser removes any buildup to recharge batteries instantly.
So the next time your wall clock stops or your remote won’t work, don’t try to replace them immediately. Eke out more juice and get the most out of them.