If the answer is yes, then you aren't cleaning the nozzle when you're done with the sprayer. I've had my Misto for years and it's never clogged up on me. When I'm done using it, I turn it upside down and hold the sprayer till it stops spraying. This gets all the unused oil out of the tube and nozzle. I got the idea from DH oddly enough. Anytime he uses a spray can, he turns it upside down and cleans out the nozzle. I figured if it worked for cans of spray paint it should would with olive oil, so I tried it and lo and behold it worked!

Yes, I know I am a btch.
I have been a btch all my life. I am good at it.
It takes very little effort on my part, and I am used to it. Applying the same reasoning to you, I cannot understand your offense at being called stupid.