Don't worry mate, they will pop! The less you think about them, the faster they go green!
However, I do believe that you are watering quite vigorously for an unpopped seed.
What I did with mine was just plant them immediately into medium (No germ / No soaking), foliar spray them about 100 - 200 ml each day and keep the top moist. First seedling popped in 4 days! Too much water could rot it, so be careful!
Of course the pot size and humidity matters, ( I even had only 40% humidity on seedling stage!) they still popped with as little water as possible.