|You did this too... once|
Good news is, that this problem can be solved, simply by squatting more. And what kind of activity do most of us at least twice a day that requires a few minutes of our time? Brushing our teeth!
So next time when you brush, squat. If in the beginning it's a bit hard to stay balanced, just hold on to the doorframe, edge of the bathtub, etc.
In time, you will be able to squat deeper and be more balanced in the bottom position.
Check this video by California Strength on lower body flexibility: