Sand only two opposite sides, not all four ports. Clean off any dust particles. Secure the feeder to the cage, using J-bolts and wing nuts. Position it over the feeder box. Fill with treats.
Animals seem to enjoy and work diligently at retrieving the food treats.
Easy clean up and withstands cagewashing. Sanding the two ports can be time consuming and very dusty. Wear goggles and a mask. Use dry, small food treats such as sunflower seeds or pieces of pretzels, etc. Usually we jiggle it loose but sometimes have to remove the j-bolt, clear it, and then replace.