Why would you spit in your scuba mask?

Ok so I'm watching 'Dirty Jobs' on the Discovery channel. Mike is scuba diving into a hippo tank, and the guys who works at the Aquarium gave him the mask to go down, and he asks ';Did you spit in your mask?'; and Mike says ';I thought they just did that in the movies.';





1) I've never seen anyone do that in the movies.





2) Why are you supposed to do that?





Just seems odd to me..Why would you spit in your scuba mask?
It keeps it from fogging up. It works, but there are store bought products that work much better.Why would you spit in your scuba mask?
it is a way to prevent fogging which sucks because you can;t clear it while underwater. licking, spitting, or rubbing the insides of a mask with oils from the skin work but spitting is by far the best.
It helps prevent condesation from forming in your mask which keeps it nice and crystal clear so you can see all the fishes!!!
so it doesn't fog up
Stops the face glass misting up
Saliva keeps the mask from fogging up. Swimmers do it to goggles as well.
some people say that spitting in your goggles prevents fogging.
True, you can use spit but it really doesn't seem to be as effective as defog that is sold in dive shops and some sporting goods stores. Baby shampoo works well too. My favorite is liquid dish soap! I know, it doesn't sound like a good idea but hear me out.





Wet your goggles and place one drop for goggles. Masks may need more. Spread the liquid evenly. RINSE WELL (I give my mask a few shakes in the water) to avoid stinging later on. Do not use your fingers to rinse because you will remove the film. Your fingers have oils that will cause your goggles to fog too.





The reason I like dish soap because it is cheap and readily available. Most are biodegradable.





Why it works...after washing, dish soap leaves a 'sheeting film' that prevents dishes from leaving water spots on dishes. It is gone after it evaporates. When you wear a mask or in this case goggles it traps moisture inside so it doesn't evaporate.





You may have to reapply if you remove your goggles for too long or often. Remember to rinse it well. I have used this for hundreds of diving customers with no allergic reaction but if you do get irritation, discontinue
Yes it does seem odd, but for some reason it helps with the fog.
1) I've never seen anyone do that in the movies or real life lol wow yeah it does seem odd
why would you do that????
It is supposed to keep the inside of the mask from fogging up.
A bit of saliva on the inside glass helps stop it misting up.