You may not even realize it, but if you live in a place with hard water (meaning your water has a high mineral content), showering can dull your hair, leaving it brassy or even slightly greenish. But there’s a way to fight this, says Jennifer J. Use the Malibu C Hard Water Treatment Packets, $20 for a 12-pack, “The Malibu Treatment will restore your hair from the damage hard water has done, leaving you with shiny, pretty color,” she says.