After each press cycle, remove as much pomace as can be removed from the bags. Each pressing cycle will cause a build-up of product in the weave of the bag. Regularly inspect your bags to ascertain the amount of build-up and change or wash the bags when necessary. Generally after 6 hours of continuous use, the bags may show signs of build-up.
Fouled bags will hinder product from flowing through the bag material, minimizing product yield and causing stress the bag itself.