Swimming at the pool - Try not to wash your hair before you spend the day at the pool, because you could be stripping off precious natural oils that protect your hair from the harsh chemical of a chlorinated swimming pool. - Use a leave-in conditioner to protect your hair while you swim. This can help prevent blondes from turning a greenish color and becoming a tangled mess -Find a clarifying shampoo or swimmers shampoo by Malibu-C. Another option you can use is 1/4 c apple c