Remove the stems from the grapes.

Rinse under cold water.

Pat the grapes dry. The drier, the better.

Place grapes onto the dehydrator screens. Try to not let them touch.

Close the dehydrator and turn onto high.

Dehydrate on high for 24 hours, rotating the trays every 2 hours or so. Don't fret if you don't rotate the trays at night while you're sleeping!

Turn the dehydrator down to 135 F and continue drying for a total of 3 days, rotating the trays every 2 hours or so. I like to move the grapes around a bit as they are drying to keep them from sticking to the screens.