Plastic slip cover so hard to take off!

[JDW]

The 2 Primes I ordered for my kids just arrived and after unboxing one (the first time I've ever used a real Prime), I found that the slip cover is a pain to remove, even for me as a grown man. My daughter can't do it at all.

I am talking about putting that sliding cover over the front of the calculator, pulling the cover all the way until it locks.

Surely there must be a trick to get the cover off quickly and painlessly. What is that trick?

Thanks.