swalowing. o what a pain in the ass. i only have trouble with saliva build up when i think about saliva in my mouth.

so dont think about it, the mind exersise i mentioned above will help keep you distracted from your physical body.

but if you do still get a saliva build up and need to swallow (or just feel the need to swallow), you will do it naturaly without thinking while your mind is distracted with the above exersise.
and if you do it naturaly, it wont inturupt any SP stuff