Using these rangehood filters is easy. Just take the filters out of the pack and insert them into your rangehood following the twist - lock slots in the central mounting hole. They'll start working right away to remove odors from your kitchen air. When it comes to maintenance, check the filters regularly. If they look dirty or you notice a decrease in odor - removing performance, it's time to replace them. Also, make sure your rangehood is turned off before you handle the filters to avoid any accidents. With these tips, you can keep your kitchen smelling fresh and your rangehood working well.