LG · Laundry · WM4000HBA · Owner's Manual
Place them in the drum before loading the laundry. Do not put them in the dispenser.
Source: LG WM4000HBA Owner's Manual, extracted pages 17-18
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Before Use: Basic Operation Overview
Important safety note Before operating the washer, read the Safety Instructions to reduce the risk of fire, electric shock, or injury.
Before the first wash Before washing clothes for the first time: - Select the Normal cycle. - Add half the usual amount of detergent. - Start the washer without clothes.
LG WM4000HBA Owner's Manual, extracted pages 17-18Using 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 21-22This answer is only published when it has a reviewed answer status and a source citation back to the manual text.