1. Always use cold water. Rinse the stain under cold water ASAP. Soak it if possible, but since sometimes you don’t always have a private sink, that isn’t always an option, so you can just rinse it well.
2. Hydrogen Peroxide – I always use peroxide on my underwear. Be careful though, because it can bleach things, so don’t use it on something you are worried about. I always just wet the item of clothing and pour peroxide on it and rub it around, rinse it out, wring it out and repeat. You can also soak the item in straight hydrogen peroxide for 15-20 minutes and then rinse it out. You can also pour hydrogen peroxide directly onto a stain on a mattress and blot it out.
3. Salt - I have never actually tried this but supposedly you can dampen the item, pour salt on it, and rub the fabric together until the stain is mostly out.
4. Club Soda - The favored stain removal method of your mom, there’s a reason. You can just soak the item in club soda for 15-20 minutes.
5. Soap - If you use soap, use something like Dr. Bronner’s Castille Soap. For some reason (science) things like dish or regular hand soap don’t really work.
6. Ammonia – Here’s another one I’ve never tried because the thought of soaking my clothes in ammonia seems like it could be disastrous. But for dry-clean only fabrics, they recommend blotting at the stain with a 1:1 ammonia to water solution. Then you rinse it in cold water and dry with a hair dryer.
Never put your clothes in hot water or the dryer until the stain is completely gone. But, if it’s too late for that, congratulations, you now have a new pair of period panties!