Using these Robinhood RHCV9G rangehood filters is a breeze. First, turn off your rangehood and unplug it for safety. Then, locate the fan motor assembly. Simply clip the round filters onto either end of the assembly. Once they're in place, you can plug your rangehood back in and turn it on. When it comes to maintenance, check the filters regularly for signs of dirt and clogging. Depending on how often you use your rangehood, you may need to replace the filters every 3 - 6 months. If you notice a decrease in the rangehood's performance or an increase in odours in your kitchen, it's probably time for a replacement. Always remember to keep your rangehood turned off and unplugged when handling the filters to avoid any electrical hazards.