Your LG Dishwasher Deserves a Deep Clean
You load your LG dishwasher after dinner, press start, and expect sparkling results. But lately, you’ve noticed a faint, musty odor wafting from the door. Your glasses come out with cloudy spots, and you might even see bits of old food or a filmy residue on the interior walls. This isn’t a sign your machine is failing; it’s a clear signal that your hardworking appliance needs some care.
Regular cleaning is the secret to maintaining your LG dishwasher’s performance, efficiency, and longevity. Over time, food particles, grease, and mineral deposits from hard water build up inside the spray arms, filter, and along the door seal. This buildup can block water jets, reduce cleaning power, and create a breeding ground for odor-causing bacteria.
This comprehensive guide walks you through the entire process, from a quick weekly refresh to a full monthly deep clean. We’ll cover the official LG recommendations, effective DIY methods, and crucial troubleshooting tips to get your dishwasher running like new again.
Understanding Your LG Dishwasher’s Anatomy
Before you start cleaning, it helps to know the key components. Most LG dishwasher models share a similar internal layout designed for easy maintenance.
The lower spray arm rotates at the bottom, blasting water upward. The upper spray arm (if your model has one) does the same for the top rack. The filter system, usually located at the bottom of the tub under the lower spray arm, is the workhorse. It catches food debris to prevent it from recirculating. This system often has a main coarse filter and a fine mesh filter.
The door seal, or gasket, is the rubber lining around the door opening that keeps water and steam inside during a cycle. The detergent and rinse aid dispensers are also common spots for clogs and residue buildup. Knowing these parts makes the cleaning steps logical and effective.
What You’ll Need for the Job
Gathering your supplies beforehand makes the process smooth. You likely have most of these items at home.
– White vinegar or citric acid
– Baking soda
– A soft-bristled brush (an old toothbrush works perfectly)
– A microfiber cloth or soft sponge
– A small bowl or cup
– Warm water
– A toothpick or similar non-metallic pointy tool
– Optional: Commercial dishwasher cleaner (like Affresh or Glisten)
The Step-by-Step Deep Cleaning Process
For a thorough clean, plan for about 30 to 45 minutes. Always start by ensuring the dishwasher is completely cool and disconnected from power, either by turning off the circuit breaker or unplugging it.
Step One: Remove and Clean the Filter
This is the most critical step. Locate the filter assembly at the bottom center of the tub. Most LG filters have a twist-and-lock mechanism. Turn the filter cap counterclockwise to unlock it and lift the entire assembly out. It may consist of two parts: a coarse mesh filter and a fine mesh filter underneath.
Rinse both filter parts under warm running water. Use your soft-bristled brush to gently scrub away any stuck-on grease or debris. For stubborn particles, let the filters soak for 10 minutes in a bowl of warm water mixed with a few drops of dish soap. Rinse thoroughly and set them aside to air dry.
While the filter is out, take a moment to wipe out the now-accessible filter well at the bottom of the tub with a damp cloth. Remove any pooled water or debris you see there.
Step Two: Clear the Spray Arms
Remove the lower spray arm by lifting it straight up off its mounting post. Some upper spray arms are removable by pressing a release tab or simply pulling up. Check your owner’s manual for the specific method for your model.
Hold each spray arm under running water and look through the small holes. If you see any blockages, use a toothpick to gently clear them out. Do not use a metal pin or paperclip, as this can scratch and damage the plastic. You can also soak the arms in a vinegar-water solution to dissolve mineral deposits. Rinse them well and ensure water flows freely from all holes before reinstalling.
Step Three: Wipe Down the Interior
With the filter and spray arms removed, you have full access. Mix a solution of warm water and a few tablespoons of baking soda. Use your soft cloth or sponge to wipe down the entire interior: the walls, ceiling, door, and the inside of the door. Pay special attention to the door seal/gasket. Run your finger along the rubber fold to dislodge any hidden gunk, and wipe it clean.
Don’t forget the detergent and rinse aid dispensers. Open them and wipe out any caked or gel-like residue. A damp toothbrush is ideal for scrubbing the small compartments.
Step Four: Run a Cleaning Cycle
Now it’s time to sanitize and descale. Reinstall the clean, dry filter and spray arms securely. Place a dishwasher-safe cup or bowl upright on the top rack and fill it with one to two cups of white vinegar. Alternatively, you can sprinkle a half-cup of citric acid powder across the bottom of the empty tub.
Run your dishwasher on the hottest cycle available (often “Sanitize” or “Heavy Wash”). Do not add any detergent or dishes. The vinegar or citric acid will circulate through the machine, breaking down grease, killing odor-causing bacteria, and dissolving hard water limescale from the internal pipes and heating element.
Step Five: Final Freshening
Once the hot vinegar cycle is complete, sprinkle about one cup of baking soda directly across the bottom of the empty dishwasher. Run a short, hot cycle (like “Rinse Only” or a quick wash). This helps neutralize any remaining vinegar odors and leaves the interior fresh.
After this final cycle, leave the door slightly ajar for a few hours to allow all interior surfaces to air dry completely, preventing mildew growth.
Maintaining a Clean Dishwasher Between Deep Cleans
A quick weekly routine prevents major buildup and keeps your appliance fresh.
– After each cycle, promptly remove any large food scraps stuck in the filter area.
– Once a week, wipe the door edges and seal with a damp cloth.
– Use a rinse aid. It helps prevent water spots and improves drying, reducing residue.
– Ensure you’re using the correct detergent (pods, gel, or powder) and the right amount. More detergent isn’t better and leads to sudsy residue.
– Regularly check that the upper rack isn’t blocking the detergent dispenser from opening fully.
Troubleshooting Common Post-Clean Issues
What if you’ve cleaned your dishwasher but problems persist? Here are some likely culprits.
Dishes Are Still Not Clean
If spots and food remain, first double-check that the spray arms rotate freely with no blockages. Ensure you’re loading dishes correctly, not overcrowding, and positioning them so water can reach all surfaces. Verify your water heater is set to at least 120°F (49°C), as dishwashers need hot water to activate detergent and dissolve grease.
Persistent Musty Odors
Odors that return quickly often point to a hidden source. Check the drain hose under your sink for a kink or clog. There may also be debris in the air gap device if your home has one. Ensure you’re running your garbage disposal (if connected) before starting the dishwasher. Finally, make it a habit to leave the door cracked open between cycles to dry out the tub.
Unusual Noises During Operation
A grinding or rattling sound usually means a foreign object, like a piece of broken glass or a utensil, has fallen into the pump or impeller area at the bottom. You’ll need to inspect the sump area (where the filter sits) carefully. A humming sound with no washing action could indicate a clogged pump, which may require professional service.
When to Call a Professional Technician
While most maintenance is DIY, certain issues warrant expert help. If you see error codes on your LG dishwasher’s display (like “OE” for a drain error or “IE” for a water inlet issue) that don’t resolve after basic troubleshooting, contact support. Significant leaks from the bottom or door, a complete failure to fill with water, or a motor that won’t start are also signs to call a certified LG technician.
Regular professional servicing isn’t typically needed if you follow a consistent cleaning schedule. However, for complex models with advanced features like steam cleaning or built-in water softeners, a periodic check-up can be beneficial.
Your Path to a Pristine Appliance
A clean LG dishwasher is a reliable and efficient one. By integrating the monthly deep clean and simple weekly habits into your routine, you’ll protect your investment, improve wash performance, and eliminate unpleasant odors for good. The process is straightforward, cost-effective, and requires no special tools.
Start tonight with the vinegar cleaning cycle. Next weekend, schedule time for the full filter and spray arm maintenance. Paying this small amount of attention ensures your dishwasher continues to deliver spotless results for years, making clean-up after every meal a little bit easier.
