Over the years, my PL700 Tripod head lamps have become yellowed and hazy on the inside. I can't tell whether the head lamp is made of glass or some sort of hard plastic. I took them out and apart, and you can kind of get in via the rear, but I'm tempted to just fill them up with soapy water, or even put them in the dishwasher. If it's some sort of hard plastic I guess I should use Plexus on it. They used to look pretty nice, but they kind of look crappy all yellowed and hazy.
