Pre-wash in an LG washing machine is an extra short wash step before the main cycle that helps remove heavy dirt from very dirty clothes using water and detergent. It’s mainly meant for things like muddy, greasy, or heavily stained laundry so the main wash can clean more effectively.

what is pre wash in lg washing machine – Quick Scoop

Think of Pre Wash as a “first round” for very dirty clothes so the main wash doesn’t have to fight through all the mud and grime.

What exactly is Pre Wash on an LG washer?

  • It is a short additional wash before the normal cycle starts.
  • The machine fills with (usually cold) water, adds detergent, tumbles/agitates, then drains.
  • After this, the washer automatically moves to your selected main wash program.

In simple terms:
Pre Wash loosens and removes surface dirt and some stains first, so the normal cycle can focus on deeper cleaning instead of mud and heavy soil.

When should you use Pre Wash?

Use Pre Wash when your clothes are:

  • Muddy (sports kits, kids’ outdoor clothes, hiking clothes).
  • Greasy or food-stained (kitchen towels, work clothes).
  • Very sweaty (gym wear, uniforms, workwear).

You usually don’t need Pre Wash for:

  • Lightly worn daily clothes.
  • Simple office wear with no visible dirt.

LG even offers a Pre-wash+Normal cycle on some models, which combines pre- wash and normal wash in one stronger program for heavily soiled laundry.

How Pre Wash works step by step (typical LG behavior)

Exact timings vary by model, but generally:

  1. You select Pre Wash (or Pre-wash+Normal)
    • On some front-load and top-load models, it’s a separate option or part of a Pre-wash+Normal course.
  1. Washer fills with water and uses detergent
    • It uses detergent in the dedicated pre-wash compartment if provided.
  1. Short wash action
    • It tumbles/agitates for a short time to loosen mud and heavy soil.
  1. Drains dirty water
    • All that first dirty water is removed from the drum.
  1. Main wash starts automatically
    • The machine then runs the main wash cycle as usual (wash, rinse, spin).

Some LG guides describe Pre Wash as a “short wash step that uses detergent to remove heavy soil before the main wash begins.” That’s the official idea.

Benefits and trade‑offs of using Pre Wash

Benefits

  • Better cleaning for very dirty loads – Heavy mud and grime get washed out first, so stains are more likely to come out in one go.
  • Less manual pre‑treating – Reduces the need to soak or handwash beforehand.
  • Good for kids’ clothes & sports gear – Especially useful in seasons when clothes get dirty faster.

Trade-offs

  • Longer cycle time – You’re adding an extra wash step, so the total program is noticeably longer.
  • More water and electricity – Extra water fill, wash, and drain means higher resource use compared to normal-only.
  • More detergent – You typically add detergent for pre-wash plus for the main wash.

If the clothes are only mildly dirty, LG suggests a Normal cycle alone is enough; Pre Wash is mainly for severely contaminated laundry.

Where to put detergent for Pre Wash (general idea)

Details depend on your model, but usually:

  • Front‑load LG washers
    • Main drawer has sections: Pre Wash , Main Wash , and sometimes Softener.
* Put a small amount of detergent in the **Pre Wash** compartment and normal amount in **Main Wash**.
  • Top‑load LG washers (Pre-wash+Normal)
    • You usually add detergent in the main detergent area, following the user manual instructions, and select the Pre-wash+Normal program.

Always check your model’s detergent drawer markings; using too much detergent can cause excess suds.

Forum-style notes & “latest talk”

Laundry forums and YouTube explain Pre Wash in very similar everyday language:

“Pre wash is just washing the clothes once lightly before the real wash starts, to get rid of the worst dirt first.”

Creators often highlight that LG’s Pre-wash+Normal makes it feel like the machine has built‑in “soak + scrub + wash” without you needing to bucket-soak or hand scrub. In recent LG help articles and support pages (updated 2023–2026), the company keeps promoting Pre Wash as part of their answer to heavily soiled laundry and as a convenience feature to reduce pre-treatment work.

You’ll also see tips like:

  • Use Pre Wash more often in rainy/muddy seasons or for kids’ sports.
  • Skip it for quick daily loads to save time and power.

Mini FAQ about LG Pre Wash

1. Is pre wash only cold water?
Many explanations call it a cold water step to help with heavily soiled loads without setting certain stains, though exact behavior can vary by model.

2. Is Pre Wash the same as Soak?
No. LG documents separate them:

  • Pre Wash : short wash with detergent before main wash.
  • Soak : longer time where clothes sit in water/detergent to loosen set‑in dirt.

3. Is Pre Wash mandatory for good cleaning?
No. LG states that the Normal cycle alone is enough for regular laundry; Pre Wash is an extra for very dirty clothes needing stronger cleaning.

4. Does Pre Wash increase wear on clothes?
You’re adding extra mechanical action, so very delicate items are usually better washed on gentle cycles without Pre Wash.

Simple example

Imagine you have:

  • Kids’ white sports shorts covered in mud.
  • A few heavily stained socks from a rainy football match.

If you run Pre-wash+Normal on your LG:

  1. Pre Wash removes the loose mud and some stains.
  2. The main wash then works on cleaner water and can better remove the remaining marks.

Often you’ll avoid having to run a second full wash or hand-scrub in the sink.

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Bottom note:
Information gathered from public forums or data available on the internet and portrayed here.