The easiest self-tanner stain to tackle is one that has just happened; don’t scrub at the stain, instead, brush away any debris that may be near it and blot the stain with a baby wipe. If you don’t have a baby wipe, put the fabric directly under the faucet, run cold water over it, and add detergent if needed, then you can put it in the washing machine with a strong detergent.