Yes, clothes can go through a wash cycle without detergent, but that does not mean they are fully clean. Water and agitation remove loose dust and some soil; body oils, grease, odors, and stains usually need surfactants. A detergent-free cycle makes the most sense as a rinse or for very lightly soiled items.
Water alone removes loose soil, not all oils
A lightly worn shirt may improve with water and agitation, while activewear, underwear, kitchen cloths, or greasy clothing hold soils that water alone does not dissolve well. The result depends on what needs removing, not simply on whether the drum turns.
A detergent-free cycle can work as a rinse
If too much detergent was used and clothes come out soapy, an extra rinse with no additional product can help. It can also refresh garments with only light dust, as long as their care label permits machine washing.
Do not replace detergent with harsh homemade mixtures
Vinegar, baking soda, dish soap, and other household products are not equivalent to washer-formulated detergent. Some create excess suds, affect seals, or are unsuitable for certain fabrics. If the goal is to use less product, first adjust the dose for concentration, load size, and water hardness.
For body soil or hygiene needs, use an appropriate product
For heavy sweat, body fluids, food, grease, or a specific hygiene need, follow the garment label and use an appropriate detergent. A water-only cycle should not be treated as disinfection or as a universal replacement for normal laundering.
Sources
- American Cleaning Institute — Laundry Basics — Sorting, dosing, fabric-care, and laundering practices guided by care labels.