My original ~1990 American Harvest "round" dehydrator with 6 stack-able trays is still going strong. Thermostat, fan etc.

The BIGGEST thing I did about the same time to speed up drying and save cost was to cut out my own tray liners from fiberglass window screen material.

The weave prevents the tiny crumbles of burger gravel, finely diced celery,carrot shreds,etc. from falling out of the manufactures "screen" tray, but still allows full airflow, unlike parchment paper liners.



I just throw the screen material into my dishwasher to clean and reuse. Mine are ~ 16 yrs old now and still perfect, vs how many sheets of parchment paper and the increased drying time from no airflow.