The reason French onion dip gets watery is due to the whey in the sour cream in the French onion dip separating.
It's normal and is not harmful to eat.
You can often fix the watery French onion dip by stirring it and it should mix back together.
The whey in the sour cream can naturally separate as the French onion dip sits.
French onion dip is good for all types of chips including Fritos chips, corn chips, sun chips, Lays potato chips, hot fries rigid potato chips etc.
I also love to dip some celery or carrots into the French onion dip as well.
Another favorite thing I like to eat French onion dip with is on a sandwich or between some bread by itself.
You can also make homemade French onion dip by mixing together sour cream, mayonnaise, garlic powder, white pepper, and remaining 1/2 teaspoon kosher salt together in a bowl.
Stir in cooled onions and then cover and refrigerate for at least 2 hours before serving.