Ask HN: How to 100% turn off Google personalization for search?

I have problem that me (I'm in US) and my college (he is Europe) are getting different results for a search a Google query. We use the following to turn off personalization:

- we added `&pws=0` to query

- we use browser in incognito mode.

Is there any way to turn off personalization completely including IP adress tracking?