Use the clothing maker's care instructions and a compatible programme. Waterproof membranes, coatings, taped seams and stretch finishes can require different treatment from plain cotton even when the outer fabric looks robust.
Understanding this situation
Detergent type and conditioner permission may matter as well as temperature. A generic cotton cycle is not automatically suitable for a technical garment, and an outdoor-labelled programme does not override the garment's restrictions. Water-resistant items can also handle water differently within a load, so the programme capacity deserves attention.
A useful next step
Keep the label or manufacturer care information available and avoid experimenting with extra additives to restore a finish. If a garment loses performance, distinguish a changed coating or seam from the washer failing to clean other items. Report the treatment actually used rather than assuming a single appliance part is responsible for every change.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.