Oil becoming watery, then thickening up again...

I am pulling Sunflower Oil as I type this post. I have just noticed that the oil started out thick, and then mixed with saliva and thinnned out to water like consistency, but it has just thickened back up! Is this normal or is it due to toxins coming out? I always go for 20 minutes at a time but should I get a new tablespoon of oil when it gets thick again? Tweet