In a medium sized bowl, add the egg whites and vanilla together and whisk until frothy, 1 - 2 minutes.
Add in the pecans.
Add in the sugar, brown sugar and cinnamon.
Spray the inside of the crock pot with canola oil spray.
Add the pecan mixture to the crock pot and cook, on low, for 3 hours.
Stir every hour and when the nuts are a half an hour away from being done, pour in the water; stir one final time.
To ensure crispy exteriors, spread the nuts out on a baking sheet to cool.