How do you clean a fuel filter without taking it out 1998 Mazda 626?

To clean the fuel filter in a 1998 Mazda 626 without removing it, you can use a fuel system cleaner added to the fuel tank. Start by adding the cleaner according to the manufacturer's instructions, then run the engine to circulate the cleaner through the fuel system, allowing it to break down deposits. Additionally, you can carefully disconnect the fuel return line and use compressed air to blow through the filter, but be cautious not to damage it. Always follow safety precautions when handling fuel and working with the fuel system.