Aren't those liners ridiculously expensive!! There was a dehydrator review on Amazon that suggested going to an arts & crafts and getting plastic embroidery mesh and use that instead. That's exactly what I did. And they only cost 50 cents each. I cut the mesh to the size of the tray and had to use 2 of them per tray.
The price for 2 screens for my dehydrator is $10. The price for embroidery mesh for 2 trays was $2. Big difference!