Especially with fine outdoor clothing and gear fabrics, its smartest to use the mildest effective detergentthis extends the lifespan by avoiding unnecessarily harsh chemicals on dirt that often comes off easily. However, sometimes a more stubborn stain appears, and thats when Stain Scrub comes to the rescue. Despite its effectiveness, Nikwax Stain Scrub does not damage the DWR coating of technical garments. - Contains no bleaches or harmful chemicals that would damage, for example, the membranes of waterproof garments - Suitable for both membrane and non-membrane products (e.g. Gore-Tex, Halti DrymaxX, Texapore, eVent, Hipora, etc.) Use: - Shake the bottle vigorously - Use the brush attached to the bottle to gently scrub the product into the stain - Wash the garment or gear with Nikwax detergent as usual Note! In case Nikwax Stain Scrub causes color bleeding on the product you're treating, test first on an inconspicuous area where any color change is not a concern.