Here's a helpful New55 PN tip:

If, after the exposure, your envelope gets stuck on the way back into the holder (like in the first picture) pull the sleeve back out and run your fingernail over the bottom edge of the silver release sticker to push the edge down (like in the second picture), then you should be able to push the envelope back in fully.





This problem is caused by the bottom edge of the sticker sometimes getting caught on a ridge on the inside of some holders.