When I submerge the veggies in fruit and veggie wash, half of them float, so do you suggest 30 minutes for each side or I should flip the veggies after 15 minutes?

Reading When I submerge the veggies in fruit and veggie wash, half of them float, so do you suggest 30 minutes for each side or I should flip the veggies after 15 minutes? 1 minute

Yes, you can flip the side half way through i.e. after 15 minutes, this ensures that both the sides are thoroughly cleaned.