I am fairly new to swimming and have figured most things out except my goggle problems. I've been having troubles with my goggles fogging up during my swims so I can't read the pace clock without removing them and wipping the insides off. I have tried using anti-fogging/cleanser spray which seems to work for a little but inevitably they fog up again.I've tried a couple different goggle types but always the same problem.  Is there a product out there that really works? Is there something I'm doing wrong where they fog up like that?