I mean on the tongue versus under the tongue versus something like spitting in a container and testing it that way??
If memory serves me correctly I thought I was told years ago that under the tongue was best so thats what I have always done. My BF seems to think otherwise.
I did this morning what I always do every morning first thing is test my saliva pH and put it under my tongue it read 6.2 But when I gathered spit from just any old place from my mouth and did not put the paper directly under my tongue my pH read 7.4 All within a matter of seconds from each other. I tested several more times (but never putting the pH under my tongue and it again all read 7.4 So for the last time I put the paper directly under my tongue and again it read 6.2 and again all within a matter of seconds from each other.