Ok so not so secret now but I wanted to share this because I'm always getting asked about stain removal. Stains are one of those things that can influence the destiny of a garment - a huge amount of clothing gets dumped because stains render them 'unwearable'.
This is a really simple way of removing stains and keeping your white clothes in your wardrobe and out of landfill which is good news for everyone (including the puppy!)