Originally posted by Elroy Jetson Coca-Cola is a good rust remover too (phosphoric acid)! And like WD40 it belongs far away from your photo gear ... When I finally got it apart I realized someone had spilled a soft drink on it which had evaporated leaving hard sugary deposits in every nook and cranny of the lens.
Some would say soft drinks belong far away from people's stomachs for the same reason - sugar, acid and chemicals.
Health advice I've cheerfully ignored in my life, I'm definitely a Coke addict!