Removing Irrelevant Bumpersickers

I felt sorry for the guy behind the wheel of an SUV w/Idaho wildlife plates & a Mitt Romney sticker on Government Way over the noon hour today. I wondered when/if he’ll remove that sticker, now that it is no longer relevant. With that in mind, I read a Facebook post by FB Friend  Sarah E. Anderson moments ago. She writes: ” So I don’t want to be one of those people with an old irrelevant bumper sticker on my car. What’s the best way to remove one? Someone already tried to peel mine off earlier this year, so the loose corners are no longer with me.”

Question: What is the best way to get rid of bumpstickers?