Here’s a quick tip from photographer Jeffrey Guyer that’ll help to keep you from warping a stuck filter when trying to take it off your lens. Instead of grabbing it with your fingers or using a jar opener, you can just use rubbery drawer liner. Simply place the liner on a flat surface, press your lens (filter down of course) onto it, and turn. This allows you to get the filter unstuck while applying even pressure — no broken/warped filters, no sad photographers.
(via Gizmodo via DIYPhotography)