if there's anything embedded in it like gravel or something and it doesn't come away easily you mustn't, it comes under the categories of what you call foreign bodies, which first aider is not at liberty to poke about, you must leave foreign bodies that don't come away easily where they are and bandage them round and send them off to hospital or a doctor, but assuming it's just a little clean graze, if i haven't got a tap to put it under, then i must use little bits of gauze to wash, put in a bowl of water and just wipe, yeah, and you always wipe obviously from the centre of a wound towards the outside, otherwise if you start to wipe across the whole thing you take dirt from one side of the wound across and drop it off in the middle somewhere, so you wipe from the centre out and throw that piece away and you take another piece and wipe from the centre out and so on until you feel happy, quite happy.