What is the best way to clean the interior of a car?

Cleaning car interiors requires material-specific zone treatment. For leather seats, wipe in circular motions with neutral soap solution and a soft cloth. Avoid alcohol-based or strongly alkaline cleaners to prevent discoloration. After cleaning, dry promptly with a lint-free cloth and apply conditioner regularly. For fabric seats, spray foam cleaner, let it sit for 3 minutes, gently brush, then absorb the dirt with a dry towel. For the dashboard and door panels, first clean the edges with detailing clay, then spray a dedicated cleaner and wipe in one direction to prevent scratches. For carpets, sprinkle baking soda, let it sit for 1 hour, then vacuum. For stubborn stains, use a steam cleaner. For the headliner, apply dry foam cleaner using a diamond pattern technique to avoid saturation. For air vents, clean with damp cotton swabs. When cleaning electronic components, spray the cleaner onto a sponge and wipe indirectly. Never apply any liquid to airbag areas. Schedule cleaning during evening hours to prevent water spots from direct sunlight. Use pH-neutral cleaners with antibacterial properties. The total DIY cost is approximately 100 ringgit, offering more meticulous results at lower cost than dealership services.