Not long in with dogs and whilst cleaning them up I noticed one had a puncture just to the skin between a front outside toe and the foot pad, by saying just to the skin it looks like if you can imagine stretching out a balloon and putting a hole in it, cleaned it out with hibiscrub but can still see some dirt in it when I move the puncture wound around but I just can't get it all out, it's different from any other wound I've experienced so far, any ideas how to clean it right out?