Is it 100% necessary to clear cookies to get good flight deals?

I've set my location to Brazil and gotten cheaper flights before.


I've noticed that trick hasn't worked in a while, and I read somewhere it could be my cookies.


Clearing cookies is a pain in the a\*\* because I have to re-login to a bunch of sites I use daily, so trying to avoid it if possible.


Is there any way to make Skyscanner and Google flights (and other booking websites) not see my cookies, without clearing all my cookies? …

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