Find yourself never hitting 90 degrees when squatting? If you go too low you can put too much pressure on your knees. If you don't go far enough, well it's just a "half squat". Try this gym hack for your squats!
Use a box as a guide. Find one that fits your height and squat range. Place yourself near the box. Just enough to "tap" your bum for assurance that you are hitting 90!