Good point - be sure to buy the acid-free refills. They are more expensive but will last!
The first time I loaded mine I couldn't get it right. I took it to the frame department at Michaels where they use them constantly (the 1/2" one even though mine was 1/4" - they load and work the same).
The person in the frame department showed me how to load it correctly and I can load it in about 10 seconds - but most of the people I go to crops with take the little thing with the direction on how to fill it and put it in the ATG inside so its always there when they open the ATG to fill it.
So sad they threw it away. If it worked before it was refilled they was quite possibly nothing wrong with it other than being filled incorrectly.