The frequency with which you should wash your rain jacket depends on how often you use it and the level of dirt, sweat, or other contaminants it accumulates. As a general guideline, you should wash your rain jacket when it starts to look dirty or smells, or after prolonged heavy use in harsh conditions. For occasional use in light rain, you might be able to go longer between washes.
Washing your rain jacket is essential to maintain its performance and longevity. However, improper washing can indeed ruin the waterproofing or water-resistant properties of the jacket. Here are some tips to help you wash your rain jacket without compromising its water resistance:
Follow the care instructions: Always check the care label or the manufacturer's instructions for specific guidance on washing your rain jacket. They might have specific recommendations for the type of detergent and washing method to use.
Use a specialized cleaner: If your rain jacket is made of technical fabrics like Gore-Tex, eVent, or other similar materials, use a specialized cleaner designed for these fabrics. Regular laundry detergents can leave residues that affect the jacket's water repellency.
Machine wash with care: Most modern rain jackets are machine washable. However, use a gentle cycle with cold water and avoid using fabric softeners or bleach, as they can harm the waterproof coating.
Avoid heat: High heat can damage the waterproof coating, so avoid hot water, high-heat drying, or ironing.
Rinse thoroughly: Make sure to rinse the jacket thoroughly to remove all soap residues.
Restore DWR (Durable Water Repellent) treatment: Over time, the DWR treatment on rain jackets can wear off. After washing, you can restore the DWR by applying a spray-on or wash-in DWR treatment. Follow the manufacturer's instructions for the best results.
Dry properly: Hang your rain jacket to air dry or use a tumble dryer on a low heat setting. High heat can damage the fabric and the waterproof coating.
Remember, even the best rain jackets will eventually lose some of their water repellency over time and with use. If you notice that water is no longer beading on the surface but rather soaking into the fabric, it might be time to refresh the DWR treatment or consider reproofing the jacket.