LG · Laundry · WM4000HBA · Owner's Manual

Why did bleach or softener stain my clothes?

They may have dispensed too soon, been added directly to the drum, or been used in too much quantity.

Source: LG WM4000HBA Owner's Manual, extracted pages 49-50

Reviewed answer 2 source sections WM4000HBA Owner's Manual

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Using Detergent, Bleach, and Other Laundry Products

Using Detergent, Bleach, and Other Laundry Products
This washer uses an automatic dispenser drawer for many laundry products, but some products must go directly into the drum. For best results, use the correct compartment and do not overfill.
Before you add anything - Always use HE (High-Efficiency) detergent with this washer. - Follow the detergent, bleach, and softener manufacturer’s recommendations. - Use less detergent for soft water, light soil, or smaller loads. - Be extra careful with 2X and 3X concentrated detergents. Even a small extra amount can cause problems. - Never use more than the maximum amount recommended by the manufacturer. - Do not place or store detergent, bleach, or liquid fabric softener on top of the washer. These products can damage the finish and controls.
LG WM4000HBA Owner's Manual, extracted pages 21-22
Laundry Results Problems: Wrinkling, Staining, Odor, and Wi‑Fi Issues

Troubleshooting Laundry Results, Odors, and Wi‑Fi
Use the suggestions below when clothes are wrinkled, stained, smell musty, or when the washer will not connect to Wi‑Fi.
Wrinkling
LG WM4000HBA Owner's Manual, extracted pages 49-50

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Manual: LG WM4000HBA Owner's Manual
Citation: LG WM4000HBA Owner's Manual, extracted pages 49-50