|I don't remember where I heard this tip, but I was just in a position to try it out. A pin stuck my finger, and I didn't think it 'got me' enough to bleed, but I was wrong. I was working on a piece of cream colored cotton blend, and there it was, a red dot of blood, right in the middle of all my hard work, and in a very noticable place...heart failure...and then I remembered the tip. You use the enzymes in your own saliva to get it out. I put the little area of fabric in my mouth, got it wet, sucked on it, and it worked! Even after it dried, there was not the slightest trace of blood left behind [I didn't even need to launder it]. I don't know if this works on all types of fabric, but it's sure worth a try.