What is the best way to clean a dripper? I made mine out of a 1/2 gal. milk jug and the inside is turning a yellowish. How can I clean it without using a cleaner that could be harmful to my chameleon? Can I run it thru the dishwasher once a week? Should I use bleach and then rinse very well? Maybe vinegar? Or should I just invest in a bottle cleaner and scrub it really well once or twice a week?