Slice your beef into ¼” thick slices and your desired length.
Add the teriyaki sauce, rub, garlic, and red pepper flakes to an airtight container, and combine. Add the sliced beef, and give it a good mix to coat all the meat. Marinate for at least 5 hours or up to 24 hours.
Transfer the slices of beef to the trays of a dehydrator and place in machine.
Dehydrate at 160°F for 5 hours.
Store jerky in an airtight container for up to 2 weeks.