I stumbled onto a simple way to remove them when I took mine off, and that is this:
Hold a credit card flat against the car on one end of the stripe.
Push into the stripe with a a sort of angled motion. Slicing across it, while keeping the card flat. (Your trying to take up the end of the stripe without ripping it)
Then once you've got enough of the stripe up, you can just grab it and slowly pull it off.
I found that you want to pull straight back over itself, at about a 45 degree angle.
It might break a few times, but that's what the credit card is for. Start a new tab and keep pulling.
Once I figured this out, I was done in 5 minutes.