Is it possible to use your own saliva to clean your contact lens?

I was watching a CNN reporter talk about her time in the Middle East, and this one time she was doing a story while caught in a sand storm, and the sand kept getting in her eyes so she had to take her contact lens out, spit on it and put it back in her eye.

I wear contacts and if I were in a jam and didn’t have my glasses I guess I would try my own spit, but I don’t ever see it working.