1. Place the fibre container on a flat surface and hold steady with one hand
2. With the other hand, hold either side of the salt shaker end and give it a good pull away from the container (be careful not to spill the fibres)
3. The salt shaker end pulls off rather than screws
4. Once removed, screw on the pump
Here's a helpful video if you need visual guidance: https://vm.tiktok.com/ZGddFwRfQ/