You taste as you cook, right?
That is, taste a bit, then season (if necessary), then taste a bit again, cook or stir, then taste a bit, etc. Repeat as necessary.
You do that while cooking, right?
But you ever notice that your palate becomes "soiled" the more you taste? So that after a while you're no longer getting a true taste of what you are, um, tasting?
Let's say you are making a sauce. You taste. A bit bland. You add a dash of salt and pepper. Stir and cook a bit. Taste again. Still bland. But wait. Your tongue or palate is now "soiled" from your first taste of that sauce so that now as you taste the sauce a second time around -- even when the sauce is now more "salty" -- you don't notice the difference.
Do you bother to account for this effect? If so, what do you do about it?
Surely, you don't taste and spit a la wine aficionados, right?
A sip of water perhaps?
Something else, maybe?